Aelric
exploding brinks and a proximity sensor

Aelric
blech, i mean bricks

Urburos
No really, exploding brinks. Armored cars rigged with explosives.

Big Beef Burritos Supreme
The bricks phone home every hour or so, then the Brick Police check up on them.

Billy the Poet
By not releasing it in the US.

fluffy
Of course this requires some pretty custom hardware. But yes it is neat that when they're making hardware it's for good reasons.