Ummm.. actually a person is LEGAL in taking your photo! This is an area where people really get confused.
1. Once someone takes your photo in say, a HOSPITAL setting (which is not illegal, even if it is against hospital regulations), there is NOTHING that can be done about the actual photograph.
2. Security can ask the person to leave the premise, but cannot take their camera, cell phone
3. Now, if the person comes back onto the property, then they are guilty of TRESPASSSING; even if they subsequently take a photo while trespassing, they still haven't committed a crime as far as taking the photo, only trespassing.
This issue is where so many people are confused about the law. People generally have the assumption that they have a say-so who can take their photo and in what setting. This is not true (there are a few exceptions).
** When photographers run afoul of the law, is when they USE the photo in a way which warrants "permission", and they don't have such permission.
For those of you interested in law, you can reference such in Prosser/Keeton "Torts"... available at ANY law book store.
Hospital security would be committing an unlawful act by taking someone's camera or camera phone.
In a nut shell.... a person can take photos of you and your family (yes, that includes children) as much as they like, as long as they don't use the photos for commercial use OR publish your "likeness" for all to see giving you unwanted notoriety, etc., etc.. (remember, there are exceptions).
Teila K. Day