@@ -680,7 +680,7 @@ var stmtHonksBySearch, stmtHonksByHonker, stmtSaveHonk, stmtUserByName, stmtUserByNumber *sql.Stmt
 var stmtEventHonks, stmtOneBonk, stmtFindZonk, stmtFindXonk, stmtSaveDonk *sql.Stmt
 var stmtFindFile, stmtGetFileData, stmtSaveFileData, stmtSaveFile *sql.Stmt
 var stmtAddDoover, stmtGetDoovers, stmtLoadDoover, stmtZapDoover, stmtOneHonker *sql.Stmt
-var stmtThumbBiters, stmtDeleteHonk, stmtDeleteDonks, stmtDeleteOnts, stmtSaveZonker *sql.Stmt
+var stmtDesubbed, stmtDeleteHonk, stmtDeleteDonks, stmtDeleteOnts, stmtSaveZonker *sql.Stmt
 var stmtGetZonkers, stmtRecentHonkers, stmtGetXonker, stmtSaveXonker, stmtDeleteXonker *sql.Stmt
 var stmtAllOnts, stmtSaveOnt, stmtUpdateFlags, stmtClearFlags *sql.Stmt
 var stmtHonksForUserFirstClass, stmtSaveMeta, stmtDeleteMeta, stmtUpdateHonk *sql.Stmt
@@ -746,7 +746,7 @@ stmtAddDoover = preparetodie(db, "insert into doovers (dt, tries, userid, rcpt, msg) values (?, ?, ?, ?, ?)")
 	stmtGetDoovers = preparetodie(db, "select dooverid, dt from doovers")
 	stmtLoadDoover = preparetodie(db, "select tries, userid, rcpt, msg from doovers where dooverid = ?")
 	stmtZapDoover = preparetodie(db, "delete from doovers where dooverid = ?")
-	stmtThumbBiters = preparetodie(db, "select userid, name, wherefore from zonkers")
+	stmtDesubbed = preparetodie(db, "select name from zonkers where userid = ? and wherefore = 'desub'")
 	stmtFindZonk = preparetodie(db, "select zonkerid from zonkers where userid = ? and name = ? and wherefore = 'zonk'")
 	stmtGetZonkers = preparetodie(db, "select zonkerid, name, wherefore from zonkers where userid = ? and wherefore <> 'zonk'")
 	stmtSaveZonker = preparetodie(db, "insert into zonkers (userid, name, wherefore) values (?, ?, ?)")

@@ -10,7 +10,7 @@ github.com/rivo/uniseg v0.0.0-20190313204849-f699dde9c340 // indirect
 	golang.org/x/crypto v0.0.0-20190621222207-cc06ce4a13d4
 	golang.org/x/net v0.0.0-20190620200207-3b0461eec859
 	humungus.tedunangst.com/r/go-sqlite3 v1.1.3
-	humungus.tedunangst.com/r/webs v0.6.19
+	humungus.tedunangst.com/r/webs v0.6.20
 )
 
 go 1.11

@@ -36,3 +36,5 @@ humungus.tedunangst.com/r/go-sqlite3 v1.1.3 h1:G2N4wzDS0NbuvrZtQJhh4F+3X+s7BF8b9ga8k38geUI=
 humungus.tedunangst.com/r/go-sqlite3 v1.1.3/go.mod h1:FtEEmQM7U2Ey1TuEEOyY1BmphTZnmiEjPsNLEAkpf/M=
 humungus.tedunangst.com/r/webs v0.6.19 h1:0cxR4JmHDMQmMwboRlycRO+67OPtgtCwLX8fuDu9IRo=
 humungus.tedunangst.com/r/webs v0.6.19/go.mod h1:S9sXpVSbgAIa24yYhnMN0C94LKHG+2rioS+NsiDimps=
+humungus.tedunangst.com/r/webs v0.6.20 h1:fKTjJ+EQUlxj8vWBtFMhX7aYbMwAnUWbDhY7hotkXq0=
+humungus.tedunangst.com/r/webs v0.6.20/go.mod h1:S9sXpVSbgAIa24yYhnMN0C94LKHG+2rioS+NsiDimps=

@@ -302,9 +302,48 @@ }
 	}
 }
 
-func osmosis(honks []*Honk, userid int64) []*Honk {
+var desubbed = cache.New(cache.Options{Filler: func(userid int64) (map[string]bool, bool) {
+	rows, err := stmtDesubbed.Query(userid)
+	if err != nil {
+		log.Printf("error query desubbed: %s", err)
+		return nil, false
+	}
+	defer rows.Close()
+	m := make(map[string]bool)
+	for rows.Next() {
+		var xid string
+		err = rows.Scan(&xid)
+		if err != nil {
+			log.Printf("error scanning desub: %s", err)
+			continue
+		}
+		log.Printf("bad parent: %s", xid)
+		m[xid] = true
+	}
+	return m, true
+}})
+
+func osmosis(honks []*Honk, userid int64, withfilt bool) []*Honk {
+	var badparents map[string]bool
+	desubbed.GetAndLock(userid, &badparents)
+	j := 0
+	reversehonks(honks)
+	for _, h := range honks {
+		if badparents[h.RID] {
+			badparents[h.XID] = true
+			continue
+		}
+		honks[j] = h
+		j++
+	}
+	desubbed.Unlock()
+	honks = honks[0:j]
+	reversehonks(honks)
+	if !withfilt {
+		return honks
+	}
 	filts := getfilters(userid, filtHide)
-	j := 0
+	j = 0
 outer:
 	for _, h := range honks {
 		for _, f := range filts {

@@ -112,6 +112,7 @@ <button onclick="return flogit(this, 'unsave', '{{ .Honk.XID }}');">unsave</button>
 {{ else }}
 <button onclick="return flogit(this, 'save', '{{ .Honk.XID }}');">save</button>
 {{ end }}
+<button onclick="return flogit(this, 'desub', '{{ .Honk.XID }}');">desub</button>
 <button><a href="/edit?xid={{ .Honk.XID }}">edit</a></button>
 </div>
 </details>

@@ -101,15 +101,16 @@ case "/atme":
 			templinfo["ServerMessage"] = "at me!"
 			templinfo["PageName"] = "atme"
 			honks = gethonksforme(userid, 0)
+			honks = osmosis(honks, userid, false)
 		case "/events":
 			templinfo["ServerMessage"] = "some recent and upcoming events"
 			templinfo["PageName"] = "events"
 			honks = geteventhonks(userid)
-			honks = osmosis(honks, userid)
+			honks = osmosis(honks, userid, true)
 		case "/first":
 			templinfo["PageName"] = "first"
 			honks = gethonksforuser(userid, 0)
-			honks = osmosis(honks, userid)
+			honks = osmosis(honks, userid, true)
 		case "/saved":
 			templinfo["ServerMessage"] = "saved honks"
 			templinfo["PageName"] = "saved"
@@ -117,7 +118,7 @@ honks = getsavedhonks(userid, 0)
 		default:
 			templinfo["PageName"] = "home"
 			honks = gethonksforuser(userid, 0)
-			honks = osmosis(honks, userid)
+			honks = osmosis(honks, userid, true)
 		}
 		templinfo["HonkCSRF"] = login.GetCSRF("honkhonk", r)
 	}
@@ -723,7 +724,7 @@ func showcombo(w http.ResponseWriter, r *http.Request) {
 	name := mux.Vars(r)["name"]
 	u := login.GetUserInfo(r)
 	honks := gethonksbycombo(u.UserID, name, 0)
-	honks = osmosis(honks, u.UserID)
+	honks = osmosis(honks, u.UserID, true)
 	templinfo := getInfo(r)
 	templinfo["PageName"] = "combo"
 	templinfo["PageArg"] = name
@@ -739,6 +740,7 @@ templinfo := getInfo(r)
 	if len(honks) > 0 {
 		templinfo["TopHID"] = honks[0].ID
 	}
+	honks = osmosis(honks, u.UserID, false)
 	reversehonks(honks)
 	templinfo["PageName"] = "convoy"
 	templinfo["PageArg"] = c
@@ -1822,14 +1824,15 @@ var honks []*Honk
 	switch page {
 	case "atme":
 		honks = gethonksforme(userid, wanted)
+		honks = osmosis(honks, userid, false)
 		templinfo["ServerMessage"] = "at me!"
 	case "home":
 		honks = gethonksforuser(userid, wanted)
-		honks = osmosis(honks, userid)
+		honks = osmosis(honks, userid, true)
 		templinfo["ServerMessage"] = serverMsg
 	case "first":
 		honks = gethonksforuserfirstclass(userid, wanted)
-		honks = osmosis(honks, userid)
+		honks = osmosis(honks, userid, true)
 		templinfo["ServerMessage"] = "first class only"
 	case "saved":
 		honks = getsavedhonks(userid, wanted)
@@ -1838,11 +1841,12 @@ templinfo["ServerMessage"] = "saved honks"
 	case "combo":
 		c := r.FormValue("c")
 		honks = gethonksbycombo(userid, c, wanted)
-		honks = osmosis(honks, userid)
+		honks = osmosis(honks, userid, false)
 		templinfo["ServerMessage"] = "honks by combo: " + c
 	case "convoy":
 		c := r.FormValue("c")
 		honks = gethonksbyconvoy(userid, c, wanted)
+		honks = osmosis(honks, userid, false)
 		templinfo["ServerMessage"] = "honks in convoy: " + c
 	case "honker":
 		xid := r.FormValue("xid")