I had 9000 followers and was a top writer in several topics on Quora, but I was banned - they kept telling me to remove content that others had complained about, but never once told me exactly where that content was, or what was offensive about it.

I'm still ticked about it, but since Quora never allowed the opportunity to dispute the complaints or even pointed at what the complaints were about, I'll never go back. As it stands, anyone can essentially get anyone else banned by submitting repeated complaints - and Quora apparently cares not one whit about giving the subject of the complaints a chance to fix the problem.