Getting MJ even legally without a medical card in the future is still linked to your drivers license (a purchase limit is imposed at the stores). If the state keeps track of that, a database needs to exist somewhere.
I dont smoke pot (and personally it doesnt bother me unless someone is smoking next to me and blowing smoke near my face), but if Ms. Maura can get another excuse to take guns away, she'll use this i reckon.
In my opinion, handling arms under the influence of any intoxicant is foolish (even pot despite people telling me its less impairing than alcohol), wait until it wears off. I know pot stays in your system for weeks after (even though youre no longer intoxicated), and if a stipulation like that is imposed to determine intoxication, thats overboard.
However, I think if the tax revenue from legal pot goes to local schools and not to Maura's re-election campaign, I support it. The revenue i saw from Colorado legalizing it raised a huge amount from schools. ...and if Mass uses part of the tax money to fight the heroin epidemic _(and the school system) in my state, thats a small win in my book (I work with a high risk population and see firsthand effects of that garbage on people daily.)