Here's a link to a news story about it:
http://www.cnn.com/2008/POLITICS/06/10/starr.paparazzi/
My understanding is that the roving gangs of paparazzi are starting to become a public nuisance and interfering with non-celebrities' ability to do simple things like pick their kids up from school, or have dinner out with friends. Unless we're going to put our celebrities in zoos, I don't see much recourse other than putting some restrictions on the paparazzi. I don't see it as much more of an impediment on free speech than requiring a permit to block streets for a protest or parade.
I do see allowing the paparazzi to behave as badly as they want to without consequence as giving them freedom at the expense of other people's freedom. I don't see how their right to free speech should trump my right to leave a restaurant. If they didn't have cameras around their necks would it be OK for them to barricade a business and prevent customers from entering or leaving? If I have my camera, does my right to free speech allow me to block traffic or to prevent the person I want to take a picture of from walking away from me?
-Colleen