Kind of a pet peeve for me.
This is what the seat looks like after 500k miles (and before replacing):
Copy the picture post it in your truck and tell them to lift their ass off the seat before stepping down or they will be put on the Not Worthy to Ride in Truck list.
Speaking of pet peeves, my wife is murder on cars, her car becomes a rolling kitchen and bathroom counter with stuff everywhere. I bought a new 95 Mustang off the lot and when I got home with the car, the wife asks: "So do I get a key?" I said sure but I want to over a few things first. I took her out to the car and said, First always lock the car wherever you go, and when you unlock the door, don't be jamming the key all around trying to find the keyhole, look and put the key directly in. Okay, now notice when I get in, as I swing my feet into the car, I don't kick the door speaker cover. I don't want it to get all marred up. Go ahead and get into the passenger seat. When putting the key into the ignition the same applies as the door lock. Don't be hunting around scratching up the steering column. Wait, let me see your key ring. (She pulls out this massive thing with a bunch of keys and I don't know what all) Okay, I says, You're going to need to get a key ring for just this car key. I don't want all those keys and crap on your key ring swinging back and forth scratching the steering post. Next, no kids eating in the car, and put the groceries in the trunk, I don't want to spend six months smelling sour milk "accidently" spilt on the back seat. And another thing, wherever you park, park far away from the store entrance, fat people don't park way out in the parking lot and they're the ones who swing their car doors way open and ding adjacent cars. Oh another thing, at which time she said, "oh forget it" and went into the house. Which is exactly what I hoped she would say.