Today, this user started this thread: http://scp-wiki.wikidot.com/forum/t-679982/why-sssso-sssserioussss, mostly exhibiting his gripes about the criticism style of the site. In this thread, he had made some comments I have found rather disturbing, most notably this one: http://scp-wiki.wikidot.com/forum/t-679982/why-sssso-sssserioussss#post-1828372
With permission from Heiden, I have PM him. Message as follows
Reply as follows:
Sorry. I just sort of snapped. It won't happen again.
So far so good.