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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. 
The thing about "Art of War" is that it is incredibly short and can be read from cover to cover in a half hour. It is an interesting read, but when somebody is trying to position themselves as an intellectual and they name drop Sun Tsu, you can tell they aren't very much of a reader.