I'll let Dennis Gruending ponder that one. But one small point that seems to have been missed in the case of Occupy Toronto:
In Toronto, the occupiers were camped in a park owned jointly by the city and the (Anglican) Cathedral Church of St. James. Toronto mayor Rob Ford wanted to evict the occupiers but the church said on its website that it was not in favour of that.
So, how do you go about throwing people out of a park that they have been OKed to use by the park owners?