I seem to recall it was my point that the folks with the glossy signs are mostly union and organized liberal political groups showing up to co-opt the crowd. Strange that you ignored this one, and this one, and this one, and this one (definitely a student), and this one, and this one, and this one.
Those are also from the first page I linked. While there are some older people, the overwhelming majority of the folks there, and certainly of the most outspoken folks there, are young students.
Which isn't to say that youth doesn't make up a percentage of the protests and probably makes up a majority of the tent dwellers (hard to live in a tent when you have kids at home) but do they make up a majority of the protesters at large or a majority of the movement? You'll have to do better than pointing at some select photos of youth acting goofy (and thus photo-worthy) to make that point.
But it's that "youth acting goofy" that is calling attention to the movement in the first place. And it's that attention that is now attracting the more mainstream liberal groups and getting them to show up and pretend that their message is the same as the youth's message (co-opting it). That's the point I was making. The kids are being used at this point. We'll see how long it takes them to realize this and become disillusioned.