Anime avatars are often a coin toss between (potential) comrade and chud, so it may be fun and maybe helpful to think about and share those in the place of that old bellwether for chuddery.
Mine is anyone with ".eth" as a suffix in their online name. I have yet to see a single person that does that that isn't a chud.
It may even be cheating, but seeing an actual cryptofascist cartoon "original NFT do not steal" is a pretty reliable red flag too.
EDIT: Oh yeah, I almost forgot.
Anyone who unironically uses the word 'woke'
Anyone who is obsessed with punishing petty crime
Anyone obsessed with punishing kids
I would also throw the words "removed" which is overt, and "social norms" which is a bit more covert.