Tiresling mounted on the roof solves everything.
Enormous elastic band+mounts for band+large tires=unstoppable projectile
Think about it, someone gets really pissed at you, comes after you in your own home, you fire a freaking tire at them at 40 mph or higher, they are SO going down.
...And if the cops show, you can't stop a fucking tire
You'll still get punished but atleast you can brag about taking out a few cops and maybe their car.