When I saw the title of this thread I just burst out laughing. And Yang Bang... that is EXTREMELY creepy.
BAWAHAHA, I do the exact same! I have the perfect pair of reflective sunglasses, which I use to do this, although I mainly just stare at hot girls/guys. I used my other pair, which I found out weren't actually that reflective : (... and that was AFTER I creeped out this poor boy on the bus. I knew something was amiss when he kept squirming...
I also follow hot people around campus, and not so subtly either... HEH HEH HEH.