Quite honestly, you'd have to be sitting in a fully enclosed 8x12 room with three or four pot smokers puffing away like chimneys to get high from second hand smoke against your will. And that's assuming you didn't have the presence of mind or physical ability simply to get up and leave the room. To put it another way, this fear of yours is largely unfounded.
Spoken like a user. :D
No, if you’re in an apartment complex, you think partying potheads won’t spread their smoke down the halls? It’s been smelled in larger and more open environments than that.
If it works for tobacco ninnies (which at least won’t alter their consciousness, BTW), it works for us pot ninnies.