Any good DMS of that calibre can't be disabled. The operator must take upfront payment and not care if you die or not, only fulfilling a contract you can't go back on. Sounds like something a Swiss bank could do for you, if stereotype is to be believed.
Well, that may be so, but try explaining that to a (probably) not so intelligent bad guy who will just continue torturing you. Maybe a good feature for a DMS system would be a fake shut off switch that appears to be convincing to an adversary.
