If anything it should be the total opposite the handball law was basically to stop people from picking the ball up it wasnt designed to be used for giving penalties when a ball bounces up onto someones arm without them realising.Anytime that the ball strikes an arm (and lets forget about below/above the sleeve line) should be handball, even if accidental. The rule would be the same for everyone and it would help end the suspicions of favourtism. The only exception should be when, in the ref's opinion, an oppsotion player deliberately directed the ball on to a players arm. In this case it wouldn't be handball and the attemped cheat should result in an automatic yellow card (and ref's should be sanctioned when they tried to bottle out of giving it)