No, I'd be thankful that someone raised me and would consider them my real parents. Being mad about something like that just isn't worth it. How do you think your parents (the ones who raised you and gave you the option to have the life you have) would feel if you just got pissed off because they weren't your biological parents. To me the persons parents would be the ones who raised you and instilled values in you, not the sperm and egg donors.