I know UCHSC is the reverse, they claim their minimum is a 2.5 on paper, but when they spoke at my school they were very forward with the fact they don't accept anything below a 3.0. They told us that if anyone got accepted with a GPA below 3.0, it's because they had already been accepted and pulled C's in their remaining pre-req classes. I find that a bit silly, might as well just make the official minimum GPA 3.0 then, but I guess it's an easy way to make some money off of the application fee.
Maybe those schools make exceptions in very special cases, like low grades were due to a death in the family, or were isolated to a single semester while everything else has been awesome. Maybe someone is absolutely spectacular in every other aspect of their application and kicks major butt during the interview and they decide to take a chance. If you feel that the other areas of your application are very strong, then I say go for it... if not it might be a waste of money and they'll just pluck the check out of the envelope and dump your app in the trash.