Ridiculous. I read both of those links and many of the comments for them. The ATF is the height of hypocrisy. The sell fully automatic AKs and M16s to the drug cartels........ There was a comment from an ATF spokesman stating that the no guns did not apply to card holders. The question for new gun purchases asks if you use, or are addicted to, marijuana, even in a medical state. I think he is saying that you are not protected for the use of marijuana in a medical state, UNLESS you have a card. It also states that NO ONE has been arrested for possesion of firearms or ammo while possesing medical marijuana and that each instance will be assessed on a case by case basis. So, I think you are safe to have a gun at home, next to your plants. Just don't have a major grow with armed guards.
In my opinion alcohol+firearms is 10000000x worse than marijuana+firearms. Where's the common sense?