I don't have any peeves well, except one.
Cisgenders on trans-websites who are pretending to be trans. They use lot's of "->-bleeped-<--talk" but some of the things they say or do just don't add up.
For example, another site I attend and moderate a user came on and try to say "she" got hormones as young as 6.
Which is utterly ridiculous, highly unethical for any doctor, and would probably kill a small child or at least cause severe developmental problems as a body that young is ill prepared to deal with the rigors of sex hormones.
It was later found out that this supposed transwoman was actually a 16-year-old cisgender girl.
-AM