I think throwing rocks at him was the best idea!
I hate that people can do that, they blatantly have no clue what they're dong. If you do take photos do the whole; 'Aw I want that bun so I'll take a photo to check with my mum/other half etc.' Then he won't suspect you, that's what I've done a few times and as long as you smile, you geenrally get away with it. Let us know how it goes.