Assault with a deadly bubble

I have been genuinely impressed with the way police in the capital region have handled protests at the legislature. The emphasis always seem to be on avoiding needless confrontations, while ensuring a quick response is available if required.
And it has worked like a darn.
Perhaps they could offer consulting services to other forces to avoid ridiculous confrontations and arrests, like the one shown on this video from the G20 summit.
Which of course is made more ridiculous by the failure to take action against the small number of vandals who smashed things at the summit.