I just checked and login to my account and my account is fine and not disabled. I guess Bittrex only targeting some people? Because my account there is not have coins left in my wallet.
A bit shaddy though, it's better to move your coins from there.
We can only say they are targeting people if there are a lot of traders here giving feed back about their account getting lock.
Thus far, OP is the first person I know that complains about the problem, we are not sure what really happen, it could be some violation on his part but I cannot judge since he does not point any violation, but he would know based on the reply of the support.