That's the point...it's not true.
This is all based on Mother Jones' effort at Pro-Life voter suppression for Romney. There is no direct connection between Romney and the activities of the medical waste company. Period. But they are hoping to muddy the water enough to create the impression that there is one. And the insane ABR cheerleaders are helping advance the ball. Purely out of self interest.
This is no different than conservatives helping Green Party candidates get ballot access. They know there are environmentalists dumb enough to fall for it, even though it means that voting Green Party will, in fact, undermine their efforts at advancing their favorite cause. (See Ralph Nader)