Laurie: I'm not sure I understand your comment about they/them. Those are non-binary/gender-neutral pronouns and aren't used across the board by trans people. E.g. trans women who want to be identified as she/her use she/her.
That's interesting about it being triggering. Certainly if someone isn't comfortable with sharing their pronouns, they don't have to. I suspect that's a really small minority, though. The overwhelming response I've heard from trans people online and in person is that it's a good thing.
It is a small thing for cis people to do, which I think is all the more reason for us to do it. It shouldn't be a thing that only trans/non-binary people do.