If you install an empty flashlight on a car, when uninstalling it’s loaded with 100 batteries again, so by repeating the process you can get endless batteries.
[size=36pt]NNNNNNNNNNNNNNNNNNNNNNNNNOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO!!![/size]
now they’re gonna take away my only means of procuring enough batteries for my toys 
I think this is already on the Github issue tracker, actually.
I suspect people haven’t fixed it just because it’s not quite trivial, and it’s also hard to accidentally abuse (so only significantly impacts those who are doing it intentionally).
Don’t you use about 50 batteries each to both install and remove with the welder? Or was it only with installing?
Still, seems a bit of a slow way to gain batteries, regardless.