Look, I always tell my 7-year-old students they are not allowed to bring glitter glue for art classes.
Do they still bring them? Yes.
Do I confiscate the said glue from every single student who brought them?
No. Unless I caught them using the glue openly in the classroom.

Same applies in this matter.
It's terrible that the streamer was harrassed by a group of individuals and specifically targets to mass report him.
But it should not be a surprise if people get banned from casually displaying that they're using an add-on when it has already been told/written in TOS that it is not allowed.