Students pulling the "I'm the customer, and you, Professor X, or as I shall now call you, Chucky, must keep me happy," practically guarantees there will be no learning done in that institution. If I see myself as "paying for a degree," how dare you accept my money and not give me one, even if I do not do any work?
This is one reason why I don't like the trend of "I'm Charles, and you're all my new best buddies, Tim and Jane and Sarah." The best professor I ever had not only insisted we use his title, but never once referred to us students as other than "Ms Twikerson" or "Mr Twittiker". It made us aware that he was our teacher, not our chum, and we followed his rules in his classroom. There was no whining or excuses, just working in an atmosphere of mutual respect.