Being rude to people who are helping you not only makes you a complete jack - ass, it shows that you have very little compassion for other people. (welovedates.com)
It would be rude to ask, e.g., what's on page 72, second paragraph, third word from the right on the fourth line? (massimomarinoauthor.com)
Do not be rude to him or her or treat them like they are beneath you. (rewardingresumes.com)