Gym Etiquette

So, I know I'm not covering any new ground here by talking about "gym etiquette" (surely there's a Seinfeld episode out there, right?) but is it rude if you're jogging on a treadmill, and Large Smelly Guy suddenly steps up on the treadmill next to you, and you're panting pretty hard because you've been jogging for awhile, thinking about the UNTITLED KATE & SAREET NOVEL and then LSG's smell starts wafting over and you're just breathing in millions of smelly molecules with every pant and you want to move over to another treadmill - but is it rude to?

Also, suppose you're lifting dumbells by a bench and you want to sit down and use the bench but it's being used by someone but then he gets up and he's left sweat on the bench, and he's clearly not wiping it up, but he's still standing by the bench - is it rude to ask him to wipe his sweat off the bench?

Is it rude to glare nastily at the woman who's picking at her calloused feet during Pilates?

Can you get away with removing a wedgie if you're running on a treadmill that is located in the middle of all the treadmills (people running on treadmills directly behind you)? What are the chances that someone will see you pick your ass?

Thoughts on a hump day.