I've DM’d numerous times, though directly to Tim — I'll note to DM the group in future, thank you.
In addition to “hateful, abusive, or discriminatory", though, I (and I think a lot of others) would much like to add “bringing up Gaza”. It's not even necessarily wanton trolling — some are probably well-intentioned.
IMHO there's no good that can come of it, it perennially derails conversation from constructive topics.
I beg you, shut down such threads immediately.