Complete paraphase, but when Jason Fried talked about a company's relationship with customers: "'We apologize for any inconvenience we may have caused' - What do you mean may have caused? You f-ing caused it."

Companies need to be more honest, open, and transparent when dealing with their customers. Make your products easy enough that anyone can use them (sort of "assume a dumb customer"), but when you deal with your customers, treat them with the utmost respect and appreciation for their intelligence.