[vlan0]

I don't have an answer for your problem. As it seems fairly identical to someone who reeks of tobacco. I'm not positive there is much you can do about that in a packed theater.

As someone who does use the drug, I would be surprised if smoking will still be as common when full legalization exists. Concentrated and edible forms of the drug are very popular in legal states. These are both my preferred method of consumption. Neither of which would cause the scenario you were subject to.

Also, that person that reeked does not sound like a courteous person. I make every attempt possible to ensure no one even knows I'm using marijuana in the parking lot prior to the movies.