Gym Etiquette

Did no one's parents ever teach them basic etiquette? These are things I shouldn't have to request of anyone:

• It's bad enough when you do it in the mall, but don't wait ten minutes for that guy to back out of that parking spot. Worst case there is ample parking across the street, and it seems rather silly to make you get the closest spot to the door when you're going to the gym. Spend a little less time on the elliptical if you feel the need, but don't be afraid to walk.
• When choosing which piece of cardio equipment to use it is common courtesy to leave an empty piece of equipment between you and the others working out when crowds allow.
• If your running on the treadmill causes the GROUND TO SHAKE such that others are questioning whether or not there is an earthquake and to hold onto their water bottle with a death grip then you're running too hard and your knees deserve whatever evil thing becomes of them as a result.
• I know you've got an awesome body for a person of age, but that's no reason to just stand around the locker room naked. Take the clothes off then put the clothes back on. No need to make sure everyone can see your naked body.
• If you insist on takng the locker closest to the scale you can at least dress with your back to the scale, so there's no question that you are aren't peeking.