No matter how annoying or pointless the protesters (which they arent), police has no right to do such things. They were not doing anything negative. And these are the same people that paid these cops with their tax money. The city runs on tax money. Citizens should be allowed to protest and generally wonder around the streets.
The price tag for that event was over 1 billion dollars. That's a MASSIVE number. For that money the city could have been renovated, new parks built, etc... Instead they spentit on a fence and bunch of cops.
If they really in fact wanted to have a peaceful meeting, why the fuck did they hold the meeting in the middle of a HUGE metropolitan downtown? It doesn't make any sense. Clearly this was a setup and someone profited big from this.