Update: I passed by a couple of weeks ago and they no longer are banging on drums. Now the loonies dance around wearing provided wireless headphones, apparently listening to a common music source. The headphones are identical and look rather expensive. They were likely donated by someone. You will not believe how ridiculous they look dancing (like real jerks —hopping around like drug-crazed hippies) to music only they with the headphones can hear. Most appear to be in their 20s. They probably watched films of Woodstock and were inspired by those lunatics.
They have absolutely no idea what they're supporting, but they know it's one heck of a street party. As long as the rent and food are free, they'll hang out. What else have they got to do?
There aren't that many of them nation wide. A handful of kids here, a handful of kids there. They just make a lot of noise to get the news coverage. That way, "The publik" thinks there are more of them.
Actually, this movement it really quite tiny, but they are well funded. The headphones and coloring books aren't free. Someone is paying for them.