Slurs, “protecting” women and women’s spaces (where “women” doesn’t include trans women) and anything TERF-y.

Any comments, encouragement etc in the vein of any/all of the elements in the list name.

“Oh you’re suprised?” or “well I wouldn’t do that and my solution is clearly better/superior”

Rude, harassers, false reporters, et al. Unpleasant people best to be ignored.