OK let me get this straight, the UAL 320 was parked at the gate and the RJ, under guidance from the ramp person, hit it while they parked their jet. If this is correct there are two people at fault, the first being the guide people and the lack of wing walkers. The second is the Captain of the RJ who should have known his/her airplane wouldn't fit.

If the A320 hit the RJ then disregard the above.