Then take them to court. Its as simple as that. I'd be in full support of that.

Asking someone to stop breaking the law is certainly not an abuse of civil liberties. But 'requiring' someone to give a written undertaking not to break the law, may well be one.

Its something I would find disturbing if tried with another group and, as much as it pains me, I feel it is necessary to apply the same standards to these guys.