you can look at it 2 ways both have good arguments,
1. Tank went to jail and paid their, and now has to serve some form of punishment from the NFL, and 8 games is that punishment.
2. Tank desreves a longer suppension. He cannot run around with guns and not get shot down by the NFL. Pac-Man is out for something less severe while Tank who had guns that he could fight a Tank with gets less? Totally ridcualos....
those are what i think are the 2 arguments and i think i made it clear which one i agree with.