I typically react the same way to the receipt checkers everywhere, and its the same as my reaction to the cable/cellphone/cutco knives people you see in stores: regardless of the question or prompt, I continue walking, look them straight in the eye, and say "no" politely, but very firmly. I've always been left alone immediately after doing so. It works with "Hey buddy what cell phone provider do you use?", "Do you like getting free things/travel/food?", "how much do you pay for cable?", and even "Sir, I need to see your receipt".
If you are struggling with shrinkage after reducing your cashiers down to a skeleton crew, force customers to check themselves out, and investing over half a billion dollars into anti shoplifting technology, then that is your fault, and I'm not gonna continue to pander to your corporate brow beating in the name of profits.
If you are struggling with shrinkage after reducing your cashiers down to a skeleton crew, force customers to check themselves out, and investing over half a billion dollars into anti shoplifting technology, then that is your fault, and I'm not gonna continue to pander to your corporate brow beating in the name of profits.