There was some art theft like the "stealing a grass texture without the artist's permission" situation. Then there was a point where he tried to send his fanbase to attack a girl for running a hate-blog against him. Then there's his interest in loli-con, which I think was first discovered when he used a loli-manga comic and meme'd a panel to be about a loli wanting YanSim updates (drugs in the original comic). Then you got his past sperg-outs on 4chan and his old stream page, his incompetence in paying professional artists, not crediting some artists in his work, stealing art and guilt tripping artists into giving him said art despite telling him they don't want their work in his game (i.e. the FUN Girl thing), and the "too many emails, woe is me!" stuff.