Alright, I've been hesitant to bring this up. First off, let me make this clear: I am not Team Steve or Team Disney. I am Team Muppets.
DISCLAIMER: THIS INFORMATION HAS BEEN NEITHER CONFIRMED OR DENIED. I AM SIMPLY POSTING WHAT IS READILY AVAILABLE.
Now, there has been someone very active on both Steve's blog and on twitter, going by the names @FleeceThroat and Steve Fawner. He has been claiming to have a lot of inside info, even going as far as to release and email from Steve back from 2005.
One of the most interesting stories he told on his twitter account was about a so called "Mafia Dinner" that happened with Steve and three other performers. You can read up about it more over the course of about 20 tweets. Based on the information they sprinkled throughout, it seems two of the performers present were most likely David Rudman, and John Tartaglia. (Tartaglia I am certain, and all the hints for Rudman line up).
Also, as support to this so called "blacklist" of performers, the twitter account says the truth will be revealed when all these performers return at the Hollywood Bowl for the first time in years.
This isn't meant to start some heated argument between members, it is simply meant to shed light on a situation unfolding on the blog that some people might not know about.