I can only imagine the chemicals that would have to be used to make half of these smells artificially. Lord knows you don't want the smells to be made of the real thing. I see cancer being the outcome. Or blindness, decayed membranes in the nasal cavity, etc. etc.
Not only that, what of those folks who live in apartments? I couldn't imagine playing a game like "San Andres" with an asshole neighbour using this piece of crap. The idea of smelling what you're playing is just retarded. Also, porn? Over 50% of porn has dudes in it. What happens when you get that awkward close up of some sweaty dudes brown eye mid jerk? Nothing says "oh yeaaaaaaaaaaah" like the smell of rotten anus.
Even worse if he let's one slip.