Bad customer service

Ok, Why is it that when you go to restaurants the people who your are trying to buy food from are nast y to you? I`m trying to give you my money to help your buisiness, I`m not helping myself I`m really just making myself broke, but hey I`ve gotta eat. So I really want to ask the people why are you rude when the customer did nothing to warrant it? I mean I know some customers need for you to be rude but not most.Are you trying to not make me come back? Are you trying to make me tell all of my friends not to go to your restaurant? So if you answered no to these questions and you want your buisiness to prosper, be nice to your customers please. A little word from the wise " The customer is always right"