Don't really have a dog in this, since I usually stick to alt-boards and only ventured onto /leftypol/ for a little this past few days.
I'm not Tankanon, but in the past week alone I've seen blatant Nazi posts stay up for hours while other posters agree with the rhetoric, and muddy the waters with shit about ᴉuᴉlossnW liking Marx or some nonsense like that. Funniest thing is that the most pushback against these outright Nazis has been from the Multipolaristas and Tankies that outright reject their populist rhetoric, (funny given that these are the people that radlibs like to compare to the Nazis to begin with).
Then on the other hand I've seen plenty of blatant radlibs attempt to use every fallacy in the book to bait people with horrendously awful takes while concern trolling about people rejecting identity politics as reactionary or counter-revolutionary, regardless of political leaning, being "le bigots" and red-browns and what have you. Being critically supportive of Russia and understanding the geopolitical benefits to people and the socialist movement that their actions bring through realpolitik? Red-fash! Not being uncritically supportive of some identarian group in a First World country shilling ideology of CIA COINTEL PRO stooges like Gloria Steinem and Marcuse (among many others)? Hurr Conspiritard!
And the problem is you can't even ignore either the Nazis or the radlibs because of pic rel. Having to shovel through mountains of idpol isn't worth it, I'd rather just stay on /siberia/ then, at least there the schizo-takes aren't out of place and the idpol stays mostly contained to the thread dedicated to it (which is the reason I continue to think an idpol containment thread is much better than an amorphous idpol ban; What is or isn't idpol is left up to the interpretation of mods, and so people genuinely criticizing and debunking bad faith liberal or nazi takes end up getting bans for "responding to bait" or in some cases being mistaken for the idpolers themselves.
A containment thread solves that - people have a piranha bowl to shit into and discuss if they want to, and posting idpol outside the thread out of the blue would result in removal, thus people would be forced to either post in the idpol thread or shut up and leave it alone. It would also make the mods job regarding idpol easier, as they'd only have to monitor a single thread and not have to respond to a ton of reports from a bunch of random threads.