hah yeah that is definitely a red flag, i published a couple at one point from a really nasty one who spammed me with really icky porn shit but i prefer to mute and unfollow generally... i even have unfollowed several people i have been interacting with for months just recently because they pissed me off so much, one for falling for the obvious scams of a spook and another for thinking i merely "prefer" Go and starting to shade into adhoms
Discussion
Kinda makes sense for crypto spam bots and such, those are useful since I operate relays and wanna know what pubkeys to blacklist.
Otherwise I mute and let them scream into void, ala USENET killfile.