Is it appropriate to ask about usage rules of web applications? For example "I posted the lyrics of a song as a comment to that song on YouTube and my account got locked without reference to which YouTube rules I violated. Which rules might I have violated?"
According to the on-topic and dont-ask pages, that question seems to fit the allowed category "Using Gmail, Facebook, Twitter, Google, or any other website which behaves like an application", and none of the forbidden categories.