Quoted from Pecos:
Locks! Locks! Locks! These will be used on the backbox doors. Thanks forceflow for the nice price and fast shipping!
Glad you'll be able to use them
Quoted from Brijam:
Because if someone wants to get into your machine, they're getting in. Locks keep honest people out. Only.
I've seen games with games with coin doors that were pried open or bashed in, cabinets fronts that were kicked in and/or torn apart, cabinet bottoms that were kicked in (Gottlieb installed metal plates on their System 1 games--not sure if the practice also extended back into the EM era or not), I even had a game where the side of the lockbar was pried open, and the siderail was pulled off (I think the effort was eventually abandoned, but it still caused a decent amount of damage).
I'd suggest going with mid-range locks that are enough to deter casual attempts at access and basic raking/picking. I'd rather see someone destroy the lock, rather than other (and more expensive) things on a game. Better to lose a few days earnings, than the earnings *and* have extensive damage to the game. It would be quicker for someone to use a battery-powered power tool to cut through the cabinet than to try to defeat a high-security lock.
In another thread, I saw photos from games from an operator who put stickers that said "cash box emptied daily" or words to that effect.