Is he dead set on knocking down the nest no matter what, or is is just because of the mess from the droppings (they made a terrible mess on my new pellet boiler until I copped on and covered it with plastic for the summer). I saw a droppings board on the Alana Ecology website, it could be made up easily enough and attached below the nest site to catch the droppings and avoid the mess. I would put something like newspaper on the board (staple it on) which could be easily removed as needed. See the picture at
http://www.alanaecology.com/acatalog...ngs_Board.html
Maybe if that was suggested to the senior guy as a solution (or just put up anyway) it might avoid the situation.