Heck, I guess my garage functions pretty well as a Faraday cage anyway.
Not to mention that if someone were standing outside of my garage trying to gain access to my vehicles, they would be trespassing and well within range of my "Squirrelinator" rifle if they were being persistent and making the appearance of threatening violence about it. Of course I would just be trying to
stop them by hitting the black box (that looks like a weapon to me) in their hand and didn't mean to miss and hit their earlobe.....