You want to change this? Instead of calling Glenn Beck, call the HQ as some have done already. Surprised that there hasn't been a coordinated effort yet.
As for the fairness of Glenn Beck in a one on one interview, I haven't seen one yet where he has attacked the interviewee like O'Reilly does. He may say stuff about them in the 'regular' show, but I haven't seen him dog someone in an interview. Not saying that wouldn't change with RP though as Glenn's biggest push is for destroying the Middle East(no matter the cost to the United States) and RP is against it.
That being said though, calling RP the 'mayor of crazytown' was pretty bad. Not correcting David Horowitz for calling us islamofascists was worse. I could see the reasons for not coming on the show, but I think the media exposure is worth so much more than not responding. He's going to call RP a loon either way, why not get on the show and at least have a chance to speak.
I think there have been a few instances of mismanagement by the campaign already with one of them DIRECTLY related to Glenn Beck. The campaign has already stated that they had an appointment with Beck and cancelled because Wolf Blitzer wanted him instead. I would be furious with a guest too if he did that. Doesn't excuse Beck for some of the most recent stuff, but the campaign hasn't been without fault in handling this.
I wish it could be possible for Penn to be there to mediate Beck, but that might be asking a bit much. I doubt Penn would let any BS come out of Beck though. That would be a heck of a show as well.
Bottom line, you want the campaign to do this, flood them with support for the idea just like has been done with many other media outlets.