It's called discernment.
Most of those you rail against are primarily normies brought here from reddit/twitter/fb etc. by the true loonies out on those platforms reposting shit-posts that happen to support their particular pet conspiracy.
The true autists are still here, they're just quiet unless they actually have an idea to share in various stages of thought-out.
those autists don't generally engage with the babbling loony masses that have invaded. we just ignore them for the most part.
I recommend you do the same as it's pointless to do otherwise.