the best you can do is ignore them. if you see them on social media- mute. if you go to a site with a lot of them- avoid that place. anime as a whole (in the west) isn't a niche anymore and that means a lot new different types of ppl are gonna be around. the non dumbass tolerance policy has worked a lot for me, but it sucks that it only helps avoid ppl instead of finding likeminded individuals.