They do. There's a power-tripping mod for most of the big trans communities that loves to ban people for silly ideological reasons.

Look at this ridiculous shit. What did I do to deserve this? Did I go onto a trans community and start throwing around slurs? No! I would never do that. I'm trans myself. I'm active and help run actual trans support groups in the real world. No, I got mass banned for "gatekeeping" for completely innocuous posts like this:

Or another one here:

The person that moderates these communities is completely out of touch. If any discussion organically arises about the nature of pronouns or the bounds of who counts as trans arise, this out of control mod mass bans anyone that disagrees with her ideology.

Note, I didn't go around harassing people who were using neo-pronouns. (Pronouns other than she/he/they.) It was simply an open discussion that organically developed. I personally find some neo-pronouns pretty ridiculous. Often they don't even meet the definition of a pronoun. But I wasn't forcing that belief on anyone or shoe-horning it in random discussions. I wasn't even addressing anyone who use them. But I went against the party line, so it was time for a purge. These comments had very high upvote/downvote ratios, with greater than 90% of people upvoting rather than downvoting. So her views are clearly extreme even within the Lemmy trans community.

And worst, this power-tripping woman banned me from a bunch of other communities, all justified by the same childish "gatekeeping" bullshit. What's worse is that it's so sudden. Like, it's not like they have a list of topics that are banned from discussion. The mods will allow discussions of these topics and then ban people who give answers they don't like. If your answer to "what does it mean to be trans" is anything short of "it's completely meaningless and has literally no real definition anymore," then you'll be banned for "gatekeeping."