Going back to the original thread idea, I think you have to make a distinction between official merchandise and un0fficial merchandise. While I agree that the comment that "muppets don't exist below the waist" was a stupid, knee-jerk answer to a question that just won't go away, it was, well, stupid and untrue. Jim Henson, who was--directly or indirectly--the creative mind behind the muppets would NOT agree that muppets don't have fully dimensional lives.
Having said that, and going back to the original thread idea, I think you also have to be honest about the difference between what the character portrays and what the audience wants to make of the characters. Bert and Ernie were conceived (Just stop. Stop now. I work with adolescents all day and I don't want to deal with that here. Sheesh!) as two very different personality'd friends who exhibited good manners and good role modeling for children. Children could watch Bert and Ernie--so very different in the way they approached life--deal with problems and ideas and hurts and friendships and realize that it was okay to be friends with people who were different in all sorts of ways. That's it. That's all.
I understand the longing that people from particular, um, culture groups feel to identify with iconic characters and want to read into their behavior some sort of acceptance of their own worldview, but the truth of the matter is that that feeling originates--and resides--with the watcher. Not the characters. Brent Spiner, who played Data on ST:TNG, has talked often about how female (and I assume, some male) fans wrote to him and gave him pages and pages of interpretation of what Data was feeling when he raised his left eyebrow, but Brent said, "All I did was raise my eyebrow." He was amazed at the different interpretations that so many--so convinced of their correct interpretation--could have of even the simplest, most mundane act. Even in Conan Doyle's day, people tried to ascribe feelings and opinions to Sherlock Holmes that Conan Doyle flatly denied the character had. And, well, to be fair, Conan Doyle would probably know. To be fair, it IS more difficult when there is not just one author--but a writer, a company that "owns" the character, a muppeteer, a NEW muppeteer when the old one is replaced, etc., etc. There are more cooks to spoil the broth or fail to maintain a unified view. And in some cases, like the newest mutation of Star Trek, the maniacally egotistical director felt like it was his job to "fix" Spock and Kirk. How nice of him.
With the muppets, this was even a problem when Jim was alive, but it is more of a problem now. (Case in point: Jim said Kermit and Piggy were really married, and yet there are all those, um...grown up people who get rather nasty about that. In other words, even when a character's "god" speaks, fans will argue they are correct and that the person who actually knows or has the right to make the decision mis-spoke and is wrong, wrong, wrong.
I'm sorry for the disappointment that comes from wanting a character to be "just like I want them to be" and knowing in your heart that they aren't. (FYI: Dr. "Bones" McCoy was supposed to wait for me to grow up--sadly, he didn't.) At some point, as an adult, most people learn that they can have as rich and varied an internal life as they want--but they don't have to inflict it on other people.
Most fans feel a certain sense of propriety for the object of their affections. We want to think that our "take" on them is the "right" one, but wanting it doesn't make it so. That is a lesson our society could stand to learn again.
I would also like to point out that no one--NO ONE--in this entire post, complained about the way television and movies portrays people of faith. They are almost universally portrayed as moron, perverts or racists, and everybody says, "Amen." It's apparently OKAY to be intolerant of SOME people. Even on Seventh Heaven, when their son renounces the Christian faith to become a traditional Jew (this is a HUGE change, and if you don't even know what that means, don't even bother to wade in here), the mother's biggest concern was that her potluck food wasn't kosher. I don't recall anyone howling indignantly (or, frankly, even understanding why they should). And Joan or Arcadia was other folks idea of "real" religious television. Deliver us.
If I like raspberry jam and I believe--no, BELIEVE that Gonzo loves raspberry jam, I don't understand why I have to go around berating everyone who doesn't think Gonzo likes raspberry jam. I can just enjoy my thought/belief that Gonzo adores raspberry jam and listen politely when other people state their arguments for why he would never, under and circumstances, like raspberry jam. If we're all civilized, we might even have a good, rousing conversation about it--without labeling each other as ignorant morons for believing/not believing whatever it is. If we all use our nice manners and our big brains to think with, we might even learn something interesting from each other.
Time and again, I have seen even sensitive subjects wallowed around here with great insight and sensitivity and I believe that we are capable of that level of discourse if we aspire to it.