FedEx policy is not law.
If you trust him enough and feel comfortable, knock yourself out. It has nothing to do with liking him or her. And you missed the post (on purpose, no doubt) where I said I don't care if the person in question just leaves the truck. You know why? Because I don't!
Here it is: "Buddy, I don't care if you, him, the Cookie Monster, or someone else moves the truck. I don't care if it sits there all night, the next day, and then the rest of the week. Some managers would cover your backside, some wouldn't. I wouldn't even think to ask a non-DOT person to do it unless there was some crazy circumstance, and I wouldn't blame him if he said no."
And then there's this: "My advice (or advise, if you will) is to not move it if you don't want to. Real difficult concept to grasp."
I don't think it's wrong. With few exceptions, I don't think it's wise. There is nothing in PBP or the PM that says to not do it.