I like Ed Morrissey's take on this Media Matters stuff.
The actual story here might be the reverse of how Carlson et al frame it here. This sounds as though the White House uses Brock and Media Matters to conduct a proxy war against its perceived enemies in the news media and to push its propaganda out through the MSM.
Frankly, given that the right is now in the process of building out a counterpart to both CAP and MMfA (it's about time duh!), maybe it's time to start beating them, instead of complaining about them? Just a thought, anyway. Also, for the record, some friends on the right can hate on me if they want, but I've pushed items to Ben Smith from the right and never had him turn something down over ideology. He's published items based upon tips from me and has always treated me fairly and it's only fair to him that I acknowledge it given some of the back and forth today.
Maybe the real point is, we have to continue to get better on the right when it comes to media? I think we are and that's why I'm happy to be working with the Breitbart sites, for example. Opportunities like that didn't exist in the recent past. Don't get mad, get even fwiw.

