It's not directly related, but to find out if people have you blocked on their IM program: Unistall the program, then reinstall it. Your contact list should be intact but will need authorization to add the contacts to your list again. The contacts that comeback refused means those individuals have you blocked now, and if you're blocked on their IM program it will reject your request for authorization without the "blocker" even knowing it. Basically, the person who blocked you won't know that you know they blocked you...Which puts the ball in your court, and can make things interesting the next time you meet at a party.