Racists my dude, racists.

You see in Reddit, for example, /r/jokes posts that are just straight-up "OTHER RACE IS INFERIOR, LOLOLOLOL" and they can stay up for multiple hours before the mods delete and/or they get enough reports for autoremoval. Or people rolling with that casual racism in a comment, maybe even something they don't realise it's racist, and whether they get told to stop or not.

It's really just about how quickly people respond to racist posts with a shutdown.

OP is innocently asking "have you encountered racists in the wild here, y'know, cause they're rife on some other platforms" (heck, twitter is basically just The Racism App)