The actual Lost Media Wiki in itself seems harmless enough, in that it pursues exactly what it says on it's title, although I can't say I check the place much to begin with.
The discord server of the same name, on the other hand? Very little to no media discussion from what I've seen. Instead, it's either weirdos trying to one up each other on how politically correct they are, or pearl clutching about how much they white knight trannies, since it's one of those "we protect LGBT people from being offended" hugboxes. Goes without saying the admins in there have a penchant for cudgeling if not outright harassing it's users for objecting to the tone policing, and then disguising their actions with "lol its just a prank bro don't take the internet seriously."