i have personally used a fake id to get pot in CO, so yeah its definitely possible. Lots of false info in this thread. if it scans at 7/11 it will scan at a dispensary, unless they sacked up and bought a box scanner (where the id is inserted into it, not just scanned, which no fake will pass through. box scanners are expensive so most places don't buy them, but they scan for the paper used to make the id (from the US mint) and the ink colors used in it, and each state puts in a special mix of colors to throw off fakes. box scanner: 
regular scanner: 
all that being said when i used mine they didn't even scan it, just looked at it. now at some dispensaries they check your id 3 times before you enter the pot room, simply to scare off kids. i have also been to a concert venue that had a box scanner and used it on my fake, it rejected it about 5 times but the doorman let me in anyways because it looked legit. your call OP