Yes. I believe it was people on the donald subreddit, which could be seen as funny, because most sane people (myself included) don't agree with them politically, but it's still a huge misuse of admin powers and proof that he has no integrity. Can't let other peoples' rights be violated if we want to keep our own.

Yeah he changed one comment saying: "Fuck u/spez" by replacing "spez" with one of the r/the_donald mods. This was also done silently so no * to indicate the comment had been edited.

Yeah, he got busted for it and wrote a half asked apology claiming he would change. Claimed he was just trolling...

Yes, its even listed on the Wiki page for reddit under 2016 controversies