It's a good thing to have a safety with a screw loose on the team. If he's being groomed to take over after Harrison is gone, he'll nicely take over the "crazy guy" role on the team. Harrison's not dirty, but he'll do ANYTHING to make a tackle and plays like a madman, not unlike the qualities Merriweather has shown, albeit in just a few plays. It's almost worth it to have a player that others consider dirty because TEs and QBs will be conscious of that and very nervous to throw it in his vicinity. That being said, he is no Rodney yet, but I'm sure he'll be molded in that image, and other teams will hate him because he's a little crazy and hits like a freight train.