My understanding is that around 2000 people were arrested[1] for peacefully assembling. It wasn't 2am, and they were not sacrificing any humans.
In the case of Naomi being arrested that I posted above, she very clearly knew the sidewalks are public, and she was very clearly not breaking any laws, and was arrested anyway. Of course charges were later dropped, because the Police very well knew they had nothing on her.
So when the Police in the USA don't like your perfectly legal use of 'right at assemble' they arrest you, fingerprint you, make sure you get a record and are out of the way for a while, then just kick you out the back door when they're sick of you.
That doesn't sound so great to me.
[1] https://en.wikipedia.org/wiki/Occupy_Wall_Street#Arrests