Depends on what you want MM to be for you.
If you want to attract models (supposedly MM is an internet model and photographer connection point), I'd think about losing images like this:
http://photos.modelmayhem.com/photos/12 … ac1dc4.jpg
Kinda hard for a model to relate to it and see it featured in her portfolio.
If you want to use MM to show off your skill set to a broad spectrum of the population, post whatever you want. But that's not what MM is all about, and you wind up being seen primarily by internet models, photographers, and collectors of chicks pix.
Just my opinion.