This is an awful and horrible thread.
But I feel for you man. When I read the title I assumed an animal or something got in there. I've had bats in my outside umbrella and expect one in my grill at some point.
but for someone to USE your grill without your permission, that's harsh. My grill has doors that I could padlock which contain the tank. I'm guessing you don't? Maybe disconect/remove the hose/valve to prevent them from being able to fire it up? Remove the ignition system? Hook up a camera (even a fake one) and put a sign in the grill that says they're being filmed if the grill is opened?
As for the mishandlng of your wife's hose (
) do you have a cutoff inside the house that you could switch off until she needs to use it? Could get one installed not too expensively most likely?
As for Hot Dogs, kids like 'em, which is good cause they don't appreciate good meat anyways. For something to try, get some Omaha Steak dogs. Really big and tasty. Otherwise go for the beer bratwurst, yummy.