The worst thing is that the mods can ban you for any or no reason, locking you completely out of the information they're providing. That is beyond an unreasonable amount of power that they can have over a user, and you just KNOW they're going to use that for political reasons.

Also the fact they can delete stuff in a way that makes them invisible to law enforcement, so a lot of illegal shit goes down there too. Combine that with the naturally hierarchal structure of discord leads to a lot of people using that power to abuse some of the more vulnerable members and of course once you call it out, poof goes the messages and poof goes your access to their server.