Triple-X tattoos are commonly worn by Straight Edge punks. Did the producers not realize this? Vin Diesel wasn't supposed to be straight edge, was he?
He does chew out the sniper guy for smoking all the time, and in the party scene before the NSA kidnaps him he's drinking a Sobe instead of an alcoholic beverage so...maybe?
It's entirely possible. Besides, would you want to be drunk when you're possibly going to have to be running for your life from a bunch of very pissed-off Russian terrorists?
There was a scene where Xander was taking pictures through a wall with an X-ray binoculars with flash on. Why would he need the flash if he's taking pictures through a wall?