@Richard.Hein: Choice is key. Unfortunately some not so nice people take information bypassing choice. Choice has consequences as it always has. But when others take the information without your choice who suffers the consequences now? What happens to the balance?
I'm afraid you don't have a choice when it comes to allowing other people into your presence in public places nor do you have a choice whether they look at you or remember your face, or publish pictures of you if you are in a public place. Even if you are in private with another individual, I think we've probably all had pictures that were less than flattering make it online, even if it's just a bad photo, and it's annoying, but what can you do?