Marvel has a really weirdly creepy schizophrenic mentality about MJ.
On the one hand, everyone in Marvel editorial who seems to be in charge practically foams at the mouth when they mention her, because how dare that dirty whore Steal Peter's love away from his sainted Gwen (which only makes Quesada's insistence that Gwen/Norman in "Sins Past" is still canon seem all the more bizarre, since he seems to hate MJ as much as anybody), and yet, they've gone out of their way to turn MJ into Spider-Man's Lois Lane, to the point that NON-comics fans are actually the MOST likely to see her as Peter's Only Love. It's like, they WISH they could disappear her forever, but they CAN'T, and it's giving them ... well, MJ Derangement Syndrome. :)