B&U administration will solve this. Imo, I think you should inform the cafe's administrator. There were multiple locks on that cafe, is not the first time happening. Previous locks were given as warnings, it was only a few PCs for a short period of time. The difference now is that the lock is globally (the entire cafe, not just a few PCs). I'm not sure how this will develop but looks to me that the cafe will get permalocked eventually. It was me applying the lock. I checked each and every account currently used there. Found only 1 guy that doesnt deserve lock but he can play from home. Made a list with players from there and their accounts. Leavers, flamers, game ruiners, racists, ban evaders. Most of the hardest rule-breaking come from that cafe and I honestly dont know why was it tolerated when it can be solved with a few clicks.
EDIT: c-hosen !unlocked
Cafe is still locked but you can play on your account from another place. If B&U crew will find you breaking rules again lock will be applied.