I am currently finding some alumni or friends to refer me. However, I am also worrying that if I manage to get an offer, and the referee has spent effort to endorse me, would they be upset if I don't take the offer? I have even heard that some companies have a "beneath the table" rule that if you refer a person, you should make sure that he will join the firm if he gets the offer (otherwise it may make the referee look bad). Any thoughts on this?