Back in my 'route rat' days, (late '70s to early 80's) at the shop we always had a a box of carriage bolts and stack of sheet metal plates that got mounted on the bottoms of any machines that were going on route. Covered the front quarter of the bottom of the game where the coin box would set. Apparently there had been a run where machines were getting a hole kicked in the bottoms of the cabinets by goobs wearing steel toed boots (or just with no feeling in their feet) so they could pillage the coin boxes. Heck, I think a machine or two that I have today still has the plates on them!

'Course, this particular strategy may have lead to just forcing the coin doors when kicking the bottoms in was no longer a viable approach.

This is why we can't have nice things!