yes....its all a conspiracy against you....
edit:
Petroleum jelly is made from petrol...which is gas....which is corrosive.....which is what old school ballers use to get the oil based paint out of their overalls in the old days......but thats beside the paint
vaseline would ruin your gun. it would gunk it up and eat away at your orings more than 3-n-1 oil would, and come to think of it. i dont think 3n1 does eat away orings. they use it to lube stuff in an engine....you dont want it to eat away sealants in there...do you?