Apparently, it's whichever is convenient. "Whitey" is afraid of guns, so any incident involving a gun, no matter how trivial, needs to be punished by Goodell, otherwise the "thug" will never get the message. And it's worked SO well so far.
Oh and PTP, Plaxico took his gun out to a nightclub and shot himself in the leg while Marshawn had a gun locked in a box in the trunk of his car. But otherwise both cases are totally the same. What do you figure Burress will get for a suspension, once he does his time? What do you think Pierce will get for trying to dispose of the gun? What should they get, based on what Joe Q. Public football-watcher thinks?