The pork chop sandwiches... the mainstay of Snappy Lunch... are purely a personal taste thing. I had a boss several years ago who was newly relocated from South Dakota. He was so enamoured with Snappy Lunch's pork chop sandwiches that he drove from W-S to Mt. Airy to pick up a large order and bring them back as a reward to our work team. I believe they would have tasted better if we could have eaten them when they were fresh and hot.
But more to your specific question... I've never heard of such verbal altercations being a regular occurance. If you're going to be in the area anyway, and you are an Andy Griffith Show fan and want to soak up some of the Mayberry atmosphere, don't hesitate to go to Snappy Lunch. Otherwise, it's really not that big of a deal.