First off Blount punched a college football player right after a devastating loss. The guy ran up to Blount and tried to rub the loss in Blount's face (true sportsmanship) and got clocked in the face for his troubles. Blount was a Heisman hopeful and it was the first game of the year for a heavily favored Oregon team. Blount was suspended for the entire year, BUT still stayed in school and participated in every practice, and was eventually reinstated for the Bowl game.
Mixon followed a girl into a fast food restaurant and cold clocked her in the face. Breaking her cheek bone. Granted the 110 lbs 18 year old female was shoving him at the time, but still, you can't punch a woman. And once she was out cold what did Mixon do, call for help? see if she was OK? nope ran like a *****.
So you are comparing apples to Grapefruits there.
Personally I think its stupid of Kraft to openly say that Mixon is off the draft board. What if during the draft someone who wants him is looking to trade for the Pat's pick? Never show your cards before you are called! You can tell BB he is off the board, but nobody else.