Apart from advising photographers to share their business cards or, if pushed, deleting the contentious photos, Eric helpfully included a list of your rights as a photographer in the US and UK.
But I’m glad we both agree on one thing: if everything else fails, smile:
“There is nothing as powerful as the effect of a smile. Even smiling at somebody frowning or pissed off will make them ease up a bit. How can you be suspicious of somebody who is smiling at you?”
Try it. It doesn’t cost much.