I'm not a lawyer but generally boobytraps are illegal. You can't set up a device to damage someone if they commit a crime. Banks can get away with it because their dye packs are handed out to criminals with the crime in progress, they're not just left around for someone to accidentally stumble on to.
Look at it this way: a child confuses your car with the car of their parents, find that you accidentally left it unlocked, picked up what they thought was their Apple device so they could watch Peppa Pig, and the dye pack goes off. A 400F firebomb is now sitting in the hands of this non-criminal child, with aerosol being sprayed into the enclosed car they find themselves in.
Again, I'm not a lawyer... but boobytraps are illegal for a reason.
Look at it this way: a child confuses your car with the car of their parents, find that you accidentally left it unlocked, picked up what they thought was their Apple device so they could watch Peppa Pig, and the dye pack goes off. A 400F firebomb is now sitting in the hands of this non-criminal child, with aerosol being sprayed into the enclosed car they find themselves in.
Again, I'm not a lawyer... but boobytraps are illegal for a reason.