Allright, lemme ask you another scenario, that was told to me by an ag pilot a couple years ago. He was at the airport intending to depart in his personal aircraft (not ag), was unlocking the door to the airplane as he was approached by the inspector for a ramp check. He said that he told the inspector that he could only ramp-check him if he was operating or had intention to operate the aircraft, and in this case he had no intention of operation but was only retrieving a personal item from the aircraft. He said he then retrieved a pair of reading glasses from the console, locked the aircraft and walked away. No repercussions. Not really sure how true that story is or how long ago it was supposed to have happened.
Where is the line at? If my aircraft is on the flight line and I'm with it, I would expect I was subject to ramp check. If I'm in my open hangar with the parked aircraft, that's another story and might be subject to interpretation. If I'm in the hangar changing oil on my plane with the cowl off and I get ramp-checked, I am highly likely to tell the inspector to get bent and send my attorney a letter.