Came across this report about the puppeteer who gave Elmo his voice. The young man who is involved in the lawsuit is the first to claim that there was a sexual relationship. So yes, it looks like Ernie and Bert are not the evil ones but in fact it is Elmo who is evil.
If you do not understand my reference about Bert and Ernie, a very long time ago on the net there were stories about Bert and Ernie being evil… and to blame for a lot of things. It was all a big joke at the time that this was going on, but now… I am not so sure about all of it being a joke!!