Michael Bay
Because, just before the filming of the Scarlett Johansson and Ewan McGregor love scene in The Island, she said she hated her black bra and wanted to do the scene topless. He refused to let her. I'll bet he's kicking himself right now. I think the prospect of seeing SJ topless would've been enough for the movie to recoup its production costs. Instead it floundered in its no-nude-SJ nonglory.
Dumbass