Yeah, what these shows are doing are positioning themselves as "anti-Muppet". They are lampooning the audience's perception of the Muppets, not necessarily the Muppets themselves.
And the thing is, this all was done years ago by Peter Jackson's
Meet The Feebles. All these other shows (Crank Yankers, Greg The Bunny, Puppets Who Kill, etc.) are just playing different angles of that basic premise.
Feebles worked because it wasn't just puppets behaving badly, it was puppets maiming, killing, sleeping around and doing other disgusting things I won't mention here. It was supposed to lampoon the Muppets and it was played to the hilt. It really works as satire, if you can make it through the movie without heaving.
It was a shame about Greg The Bunny, because I liked the characters (the puppets, Eugene Levy and Seth Green anyways) and they had a few neat ideas but the stories sucked. If Fox had supported it more it might have gone somewhere.
Now Crank Yankers isn't my cup of tea (BTW, there's a cover story in the current issue of
Mass Appeal Magazine on Crank Yankers) but it serves an audience in it's own, "Jerky Boys" kinda way. It's not ment to appeal to most Muppet fans. If it's good and funny it'll be around awhile. If it's just a novelty show it'll be gone soon.
Then again, we still have America's Funniest Home Videos with us......