i wouldnt do it.. i saw on like 60 minutes or some show a while back that even though its confidential, and they arent supposed to find out who donated, it happened. this guy was broke in college and did it like 100 times or something, then a while later a girl found him and found out that he was her dad. she wasnt looking for money or anything, just who her dad was, which was good, but i wouldnt want to risk it.