What would you do if asked to show the photo you just took ?

[bobt]

I picked show and delete if asked, funny though, people snap away with mobile phones all the time and no-one seems to care but photography with a DSLR often seems to envoke a reaction.

Exactly. So often the objection arises not because of the photograph taken, but of the person taking it. Cameras are everywhere and so are photographers, but somehow a photograph taken by an old fart with a DSLR is more objectionable than one taken by a young mother using her iPhone. Discrimination works in many ways in our society.