I first saw the ad made by Austin Texas' Alamo Drafthouse Cinema (censored, but still kinda NSFW) because it's a pretty funny viral video. It's an actual voicemail left by a customer who was kicked out because she was texting during a movie - and she's ticked off and probably pretty drunk. But then Mark Hurst pointed out that kicking out bad customers is a great way to demonstrate how much a business cares about good customers. As a good customer, this evidence makes you feel special, even "VIP", and in turn makes you respect the business for valuing your experience over additional profit. It's a well-designed policy - which can make as much difference as a product, to the user.