It looks to me like a lot of the protestors are college students from all of the colleges in NYC and surrounding states.
I caught about 15 minutes of the protest on C-Span earlier, these were not college age students. A lot of aging hippies, young old families, elderly people.
I had to turn the TV off as they were so ridiculous. Half the signs they were carrying only made sense to them as I had no clue what some were trying to say.