God forbid they use our public spaces -- especially the expensive unused ones -- for the 1st amendment exercises.
Freedom of recreation and peaceable assembly are not a constitutional right on the RKG. In fact, the claim as of last night was that the protesters had encroached on private property.
It doesn't matter that the taxpayer built both Dewey Square and the RKG. As late as midnight, protesters were appealing via Twitter to the Greenway Conservancy for permission to use the space.
As I've pointed out before, the rules change when you cede public rights to private interests.