Tubular locks (which are on most laundry and vending machines) are actually STUPIDLY easy to pick--easier than even a middle-grade padlock--they just require specialized tools that most people don't have. You can get a set of 7 and 8 pin (the most common types) tubular picks for about $60, and can teach yourself to open almost any of them in a single afternoon. It's mostly security through obscurity because of how few people actually own the tool.
Tubular locks (which are on most laundry and vending machines) are actually STUPIDLY easy to pick--easier than even a middle-grade padlock--they just require specialized tools that most people don't have. You can get a set of 7 and 8 pin (the most common types) tubular picks for about $60, and can teach yourself to open almost any of them in a single afternoon. It's mostly security through obscurity because of how few people actually own the tool.