Originally Posted by Qotsaautopilot

I'd tell that guy where to go. If he wants me off because of that I'd gladly get off and let scheduling know I'm not on my DH.

I did have a company junpseater take a seat without stopping by and the FA handed me he form (we use a paper form) at the end of boarding. I went back to him and asked him for ALL his credentials. He got the hint. Never have run into that in 10 years.