are you locking them from opening the registry in windows as well? (ie. start -> run -> regedit) ? because if not, then it doesnt matter what mirc can/cant do, they can still do it using the windows environment.
if you are, then all i can say is, dont allow the use of such functional irc clients in your cafe
there is a lock, but it does not lock the /comopen commands
you might want to suggest that in the features board, to add a lock to that command as well
