You'd be surprised. We get lots of dead beats trying to pinch sheets and doonas. School kids and Grannies go nuts for a five finger discount there. I've told a lovely old gran that she should know better and to never come back again. I marched a big man to the front counter and made him pay for a 49c sticky tape that he used.
If I ever come to your store, I'm going to be careful I don't breathe on ANYTHING, lest I do something wrong that requires me to pay for a product ...