I think the fact the song was Paris brought out more cell phones.

I saw Eddie Vedder's solo show last weekend. There is a strict no camera or cell phone policy that is widely announced and most people respect it. They seize stuff from violators and remove all EV videos from YouTube too. For such a quieter one person show, it helps the intimacy of the occasion. Pearl Jam allows everything however, and for raucous live rock shows they aren't that much of a bother, and as said above, resulting videos are a very useful way to check out bands, including GPN..