What NOT to do @ the Gym

I've spent the greater part of the past decade working at a gym of some sort. While fitness might not be my forte, I've picked up a lot along the way. This is a simple guide of what NOT to do when you're at the gym (Unless you want to be a complete and utter fool).

• Get on a treadmill, pump the incline all the way up, lean back & hang on! You're effectively negating the impact you think you're getting from the incline.
• Run on a treadmill while hanging on. Supporting your weight with your arms means you're not really running. It's the same as lying on your back and moving your legs. You could do that forever and you still wouldn't get your heart rate up. It might give your arms a little resistance training...
• Kiss/stare at/worship your muscles, meat head.
• Make faces/noises; if you have to make noises or faces, what you're doing is probably too hard for you and could therefore hurt you.
• Wear loafers/sandals/no shoes/Cowboy Boots. You're an idiot. You're not going to get the best workout and your risk for injury increases exponentially. Vibrams are fine. They at least provide a little grip.
• Wear jeans. rivets/buttons/zippers damage the pads on benches and equipment.
• Wear the same shoes you just trekked through the snow in. The salt and snow damages the equipment. 
• Wear cotton/street clothes/denim into the pool. Your clogging the filter, making it easier to drown yourself, and it doesn't hide the fat any better. Also, wearing your underwear in the pool adds fecal matter to the pool. You're gross.