1) Chuck Norris - He still packs a pretty powerful roundhouse, so stare at your own peril.

2) Bad Nose Job - The person probably knows they have a bad nose job, so you're not helping the matter by staring at it. If you feel like you must retain the memory of this hideous surgery, have one of your friends go stand in the vicinity of the person with the bad nose job and then pretend to take their picture (but actually take a picture of the nose job).

3) Car Accident - We all want to stare. We all want to see if someone is hurt, if there's blood, how much damage was done to the vehicle, etc. But don't stare and impede traffic. Seriously, there's nothing worse than being stuck in traffic for an hour only to find out it was a fender-bender and everyone is slowing down to 2 MPH to view it.

4) Short People - It's not nice to stare, but you should still look to see where they are. It'd be really embarrassing if you accidentally kicked one while walking because you weren't being observant. So look, don't stare.

5) Gang Members - Sure their hair is weird, and they probably have some interesting tattoos, but stare too long and you will probably find out what they're "packing" as well.

6) Cleavage - This is a given, but all men are tempted by it. Some women actually don't mind if a guy looks (depending on which bar you're at), but staring is creepy. You may get a drink tossed in your face, a punch from her boyfriend, or a knee to the groin. None of these are good scenarios, obviously.

7) Your Co-Worker - Again, there's no bigger creep factor than staring. On the bright side, if you follow it up with some heavy breathing and a tiny bit of drool you may get your first restraining order.