I was literally about to say what Julie said. It took probably about two weeks for the staff to do anything after the initial blow-up, even with all the mountains and mountains of chat logs. He was warned several times in private and I believe he even got an official board warning.
As for why it escalated so suddenly: that was on him. I was just minding my own business when all of a sudden one day he comes to me on Skype all pissed off and complaining about Julie and how she was a bully (as well as other things I won't repeat due to the PG-13 rules). I did not start or initiate the conversation and he hadn't even talked about her since a few days ago where I pretty much told him to try to sort things out with her and that Julie didn't have anything personal against him. He was the one who kept digging himself deeper and deeper into a hole. We didn't really do anything.
He claimed Julie was harassing his friends but wouldn't tell me who it was other than it was on the FAA, and she never talks to those people. The whole thing came out of nowhere and he was punished for it; that's all I can say. His punishment is on him and IMO he was given more than enough chances to try to do better. It seemed sudden to an outside observer but I and Julie and Nina and Jack all thought he was treated very leniently. If you asked any of them I'm sure they would say so. That said, I can see why the staff waited and everything - I don't want to sound like I am saying KK did a bad job or anything - but to us it seemed like a long wait. That was just the nature of the situation (not to mention he sent the each of us like 4 long PMs on here and kept trying to contact us over and over and over on Skype and on here ever since I blocked him, which got VERY annoying very fast).
EDIT: DG beat me to the punch, but yeah, I agree. I think it did some good since next time I will know what to watch out for. I just want to make clear that he was the one who caused these problems for himself, and we did not think he was a bad person initially. If that were the case it would've been brought to people's attention earlier.
Unfortunately though his "nice guy" shtick was very convincing for a long while.