Instead of white board markers, what about markers for writing on overhead projector slides, like the Vis-a-Vis brand? These don't wipe off nearly as easily as white board markers. It usually needs to be wiped off with a damp cloth.

I would be concerned about staining if writing was left on too long, though.

Before slamming him, remember he's the Editor IN CHIEF. There's a whole staff of departmental editors who are the proper targets of PR emails, and if the PR reps want their stuff covered, it's worth their time to find out who they should talk to. That's part of THEIR job.