>>25327
>>25329

I can do you one better. you can use regular expressions, to achieve exactly what you want.
you need to go to settings ➡ Filter. there you can set Regex filters.
I had to brute-force it a bit since I was to lazy to build something clever, but it works and you surely can build a better filter yourself.
went to the thread list on /s and got all thread numbers. threw out everything about scat and left pee.
now, if you put the following list under "Post number", where the Regex filters go, you'll see that
all scat threads are filtered out, while you can still see everything about pee only. try that on /s, only a handful of threads remain.
it also works on the overboard. of course, you still have to add newly created threads on /s to the filter later on, but that's it.

list of Regex filters to filter out everything about scat (WARNING: LONG)
btw.: performance does not seem to be affected at all.

/39165$/
/39148$/
/39141$/
/39020$/
/39007$/
/38961$/
/38847$/
/38660$/
/38572$/
/38247$/
/38244$/
/38081$/
/37971$/
/37889$/
/37838$/
/37727$/
/37718$/
/37697$/
/37565$/
/37464$/
/37417$/
/37399$/
/37302$/
/37201$/
/37107$/
/37078$/
/36975$/
/36698$/
/36255$/
/36005$/
/35992$/
/35960$/
/35920$/
/35892$/
/35835$/
/35785$/
/35491$/
/35476$/
/35386$/
/35339$/
/35225$/
/35139$/
/34995$/
/34559$/
/34469$/
/34432$/
/34324$/
/34306$/
/34141$/
/34115$/
/34100$/
/34060$/
/34043$/
/33906$/
/33835$/
/33832$/
/33816$/
/33661$/
/33645$/
/33622$/
/33601$/
/33587$/
/33526$/
/33513$/
/33466$/
/33414$/
/33276$/
/33267$/
/33249$/
/33245$/
/33138$/
/33055$/
/33051$/
/33044$/
/33027$/
/33004$/
/32824$/
/32821$/
/32759$/
/32745$/
/32740$/
/32738$/
/32604$/
/32582$/
/32447$/
/32236$/
/32165$/
/32148$/
/32118$/
/32089$/
/32067$/
/31989$/
/31983$/
/31804$/
/31785$/
/31784$/
/31769$/
/31646$/
/31611$/
/31508$/
/31289$/
/31279$/
/31247$/
/31198$/
/31131$/
/30992$/
/30982$/
/30952$/
/30949$/
/30932$/
/30879$/
/30862$/
/30829$/
/30815$/
/30704$/
/30659$/
/30532$/
/30530$/
/30511$/
/30483$/
/30477$/
/30390$/
/30385$/
/30372$/
/30236$/
/30215$/
/30189$/
/30184$/
/30095$/
/30064$/
/29956$/
/29880$/
/29787$/
/29711$/
/29687$/
/29673$/
/29665$/
/29564$/
/29556$/
/29470$/
/29390$/
/29321$/
/29301$/
/29241$/
/29103$/
/29096$/
/29090$/
/29052$/
/29043$/
/28969$/
/28968$/
/28935$/
/28907$/
/28737$/
/28700$/
/28692$/
/28669$/
/28609$/
/28605$/
/28523$/
/28517$/
/28509$/
/28486$/
/28462$/
/28457$/
/28432$/
/28423$/
/28415$/
/28412$/
/28395$/
/28380$/
/28373$/
/28371$/
/28347$/
/28337$/
/28328$/
/28321$/
/28317$/
/28311$/
/28310$/
/28308$/
/28305$/
/28302$/
/28273$/
/28231$/
/28160$/
/28159$/
/28158$/
/28107$/
/28075$/
/28066$/
/28052$/
/28036$/
/28031$/
/27930$/
/27907$/
/27879$/
/27866$/
/27836$/
/27699$/
/27560$/
/27538$/
/27537$/
/27473$/
/27451$/
/27446$/
/27417$/
/27371$/
/27362$/
/27354$/
/27348$/
/27329$/
/27325$/
/27269$/
/27195$/
/27177$/
/27142$/
/27130$/
/27106$/
/27101$/
/27078$/
/27071$/
/27054$/
/26990$/
/26910$/
/26890$/
/26875$/
/26806$/
/26665$/
/26481$/
/26476$/
/26455$/
/26423$/
/26398$/
/26363$/
/26322$/
/26299$/
/26281$/
/26248$/
/26166$/
/26165$/
/26011$/
/25983$/
/25977$/
/25960$/
/25892$/
/25888$/
/25871$/
/25832$/
/25810$/
/25804$/
/25780$/
/25770$/
/25734$/
/25679$/
/25677$/
/25665$/
/25629$/
/25557$/
/25523$/
/25519$/
/25509$/
/25415$/
/25414$/
/25406$/
/25362$/
/25346$/
/25337$/
/25331$/
/25314$/
/25238$/
/25219$/
/25170$/
/25108$/
/25074$/
/25028$/
/24999$/
/24971$/
/24969$/
/24952$/
/24930$/
/24886$/
/24863$/
/24837$/
/24832$/
/24817$/
/24795$/
/24768$/
/24756$/
/24744$/
/24705$/
/24699$/
/24696$/
/24692$/
/24690$/
/24684$/
/24680$/
/24679$/
/24667$/
/24660$/
/24633$/
/24631$/
/24612$/
/24574$/
/24553$/
/24524$/
/24514$/
/24502$/
/24465$/
/24456$/
/24433$/
/24427$/
/24395$/
/24391$/
/24358$/
/24344$/
/24298$/
/24284$/
/24228$/
/24120$/
/24118$/
/24071$/
/24039$/
/23988$/
/23898$/
/23788$/
/23565$/
/23560$/
/23460$/
/23435$/
/23417$/
/23367$/
/23341$/
/23316$/
/23155$/
/22939$/
/22864$/
/22819$/
/22781$/
/22768$/
/22746$/
/22745$/
/22737$/
/22701$/
/22670$/
/22446$/
/22380$/
/22373$/
/22270$/
/22236$/
/22224$/
/22180$/
/22151$/
/22150$/
/22136$/
/22020$/
/21929$/
/21908$/
/21343$/
/21296$/
/20345$/
/20100$/
/19963$/
/19450$/
/19377$/
/19087$/
/19083$/
/18902$/
/18750$/
/18300$/
/17819$/
/17215$/
/17108$/
/16848$/
/16346$/
/16309$/
/15982$/
/15936$/
/15608$/
/15589$/
/15500$/
/15420$/
/15368$/
/15039$/
/14515$/
/14352$/
/13948$/
/13885$/
/13816$/
/13423$/
/13112$/
/11780$/
/11768$/
/11684$/
/9035$/
/8809$/
/8594$/
/8115$/
/7143$/
/6968$/
/4635$/
/2058$/
/1635$/
/1104$/
/897$/
/494$/
/227$/
/129$/
/42$/
/27$/