I don't see the problem here. If you live on a street where people constantly speed, and the city won't do anything about it, then you should by all means be able to do something like this. It almost feels like those of you that are criticizing are actually defending complacent/bad drivers. I tell you what I would do, is animate these little guys via a remote, and if I see some butthead barreling down my street make the thing jump. That'd ruin some upholstery.