When you're flying Ag you only get a few minutes turn around between loads, So if you need to piss etc. you've got to get out and leave it running, I also need to stand and move a bit because I dont need the distraction of a numb arse when flying.
If you are operating in outback Australia you tend to leave it running just incase it wont start after you shut down and your left in the middle of nowhere with a geologist!
I dont see anything wrong with the picture, it's normal to me here in Australia.