As far as client rudeness, I can suck it up. But more importantly, why is the client being rude, and how is it effecting communication? If the client is being rude because he/she just doesn't like me for whatever personal reason (color, sex, associations), then it might be better to get another interpreter. But if the client is just plain ornery and rude to all interpreters, then I deal with that. If the client is so rude that the other parties involved are disturbed by the client's behavior, then it's up to the person in charge to, well, TAKE CHARGE!
Terps have to be careful not to take everything as a personal affront.
