Im pro legalization, but i dont think medical marijuana users should be treated any differently from "street" marijuana users until the whole shebang from top to bottom is decriminalized.
Its better for a medical marijuana user to say, OK, i know, i cant carry or own firearms, than for him to get arrested and say "but but but...i have a prescription!"
just my opinion. I also agree on the prescription pills comment. I know a handful of people that are pretty whacked out on legal, prescribed for illness pills. I wouldnt go shooting with them.