Everyday you will deal with rude people. Although you might want to go off and be rude back you have to know how to handle the situation. Being known as a business owner who is rude to their customers is not good and by no means a way to start a business.
How To Take Criticism (like feedback from parents, staff, children, community members). It takes continual improvement in taking that feedback to continually improve our skill. Here are some pretty good ideas for the feedback process.