Thats the thing. I am willing to bet that:
A - Your "reputation" on MM is not that of an established professional.
B - Your choice of models is not getting you what you want
C - MM basically sucks 98.99% of the time from what I see.
A - Get some experience and fill your portfolio with some good shots. Use family if you must.
B - Learn where to go for better models
C - Did I mention that MM basically sucks?
Oh... BTW, model mayhem... sucks.

Most of the time all one reads is "they never showed up" or "they weren't ready" or "they were late" or what ever.
"Models" like that, no one needs. Time to look elsewhere.
Find a local strobist group and if none exist... MAKE one yourself. Make some contacts, network, talk to people! Photographers that want to shoot models and portraiture almost always have aspirations of turning pro... well, guess what, being a pro photographer has VERY little to do with pressing the shutter. Learning and knowing how to talk to people and network is a GREAT tool... so go out and practice that aspect of it... find yourself models, make-up artists, other photographers, pro and otherwise... learn to network, and grow your environment to meet your needs!