I've been doing some further digging on ETI about Schreier and it just gets weirder and weirder. As best I can tell, he's just a lurker now. He was apparently infamous in years gone by as a particularly prolific troll/shitposter, but I'm having a hard time finding details because... a moderator mass deleted EVERY SINGLE ONE of his posts, on both his accounts, going back YEARS. Even though I assume it wasn't done manually, we're still talking tens of thousands of posts. This isn't recent, it was done at least a year ago. As far as I was able to find, nobody knows who did it or how Schreier convinced them, but I'm 99% sure regular mods there don't have that kind of power. If it was ever done for any other user, I can't find any info on it (though knowing what I do about the site I wouldn't rule it out either).
So in order to get any more info, I'm trying to track down what others have said about him, or to him, reading half the conversation.