I cant even walk around with an ipod on, earphones in ears, after smoking some green(while not tripping), because I get so paranoid at the fact that I can't hear what's going on around me.
When I'm tripping, I really couldn't care whats going on around me. I have been paranoid before, but thats because I forgot momentarily that it was a trip, but a friend told me "We're tripping man, its okay, its not really there".
Don't worry about it, maybe don't smoke green with it your first time, but I would recommend it to you, another time, if you enjoy LSD.
Just relax, go with the flow, listen to what the universe has to say, and fly that magic carpet across the clouds, to the sun, loop around the stars... and back to earth..