They were an unregistered anonymous user from a few years ago that said/made a lot of very controversial and rude posts. They body-shamed, mocked other users, were racist, made homophobic comments, and made fun of others' religions. They were known to make posts with rude clickbait titles. Because of this they made a lot of enemies, and most people didn't like them. KT started monitoring their posts very closely and they left the website for a while. Eventually, though, they come back and made a public apology to everyone on KT and KS, before leaving the site for good. This all happened about a year ago or so.
Remember, Jane was unregistered, meaning someone could be impersonating them now. Either way, they are pretty infamous across the platforms.