I agree, and now is a good time to reign it in. Grayson can't go crying fowl that he's being attacked becauase he would sound like an idiot "They say I'm a butt-kisser!"
On the other hand, slinging mud is an American tradition. Going back to the earliest days. It needs to be handled with tact. And rumors and accusations shouldn't be coming from anyone in the campaign.
The best thing for campaign staff to do is be positive, and honest about the issues. You let the politician have the zingers, and you leave the supporters to their mud pits.
I didn't like, however, the assumption that "Dr. Paul" (in this case Rand) supporters are "overzealous". That is a remnant of Ron Paul's campaign. As far as I can tell, we've all been perfect ladies and gentlemen. But it does prove me right from that other thread where I pointed out nothing we say or do, nothing Rand Paul says or does, nothing his campaign says or does will completely remove Rand from people's perception of Ron.