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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. 
I think that's more of an ”I've never read a book that wasn't one of the required ones in school, but want to appear smart” thing. Which is admittedly at the very least chud adjacent.
I've found that to be more common with run-of-the-mill libs, where they also always mix up fiction with non-fiction. Chuds just won't read or id they do read it's like they try to read Julius Caesar's auto-biograohy uncritically.