On a scale from 1 (least supportive) to 9 (most supportive) with 5 being neutral, I'm probably between a 2 and a 3 on this idea. If the main intent was to go to a specific cause like a charity and Colbert previously agreed to sing at a certain dollar amount or at a certain point of participation, I'd be at about a 6.5. However, it just seems like the effort is to garner publicity for the mere existence of Brony community, and not so much the show itself or at least showing that we are really good people.
Even if it was supporting the show or charity, I wouldn't be really high on the idea. Haters gonna hate, true. But I don't want to needlessly provoke any neighsayers (on the Internet) or somewhat narrow-minded people (outside of the Internet community,) either, with what would be perceived as a publicity stunt.
Or more simply, it would seem like we're forcing pony to people. The show is a ton of fun, Bronies are decent people, and the meme/subculture is still spreading. I think it's unnecessary, and I think something like this causes more harm than good.
Could it be a more discreet charity idea? Like Bronies for Good? I think I remember seeing something like that on EqD. Sorry for the lack of support. I'm just not sure if it's a good idea. I guess we'll see what e'rybody else thinks though.