a number of the channels i follow have a regular set of porn bots that post links, and also there are also obvious (to a human) machine generated comments.

I assume (without any evidence) that YT has a programmatic / ML approach to attempt to minimise this sort of crap..

I note that in this case the problem seems to be a particular word, but i don't see this as malice on YTs part.

I no longer post links as references for answers etc even when the channel creator allows them, after having one YT account permabanned for spam based (as far as i can tell.,) on links posted...

(anecdata is notoriously lacking in peer review)