Today I logged on my account. Checked my status and then I saw it. ''Banned''. It says I'm banned but I don't think I am because...

1. I can log in.
2. I haven't received any mails from Blizzard about it.
3. I haven't bought gold or done anything forbidden(I hope).

Hmm... I tried playing on a private server ONCE but I don't think that would cause this ban.

So... ?