I have met several people who claim to have medical marijuana cards and therefore been legal users. I would not want to shoot with any of them.
My first wife was advised by her doctor (back in 1985) to smoke it to help with the chemo. I had to sit outside while she smoked. It did help her and she actually gained about 20 pounds.
(I was stationed in Korea at the time and pot was available through the Korean pharmacies.)
But I see so much of this being abused. Bottom line, it is still a federal offense and you would be lying on the form.
Inside Every Bright Idea Is The 50% Probability Of A Disaster Waiting To Happen.