Putting aside the fact that any control mechanism will be broken, I've often thought that this would be handy in weapons. Imagine the UN providing free quality

Putting aside the fact that any control mechanism will be broken, I've often thought that this would be handy in weapons. Imagine the UN providing free quality weapons to poor but legitimate governments, but being able to disable them remotely should the government use them against its own people, or aggressively against a neighbour.