But as you mention, police, despite all accusations to the contrary, are not stupid. They know what policing is and it is about communities and people rather than enforcing the edicts of a given political party. It is strange how police are always politically controlled, maybe in some do-gooding place like Norway they are allowed to be professional without interference.
Along with 'twenty seconds to comply...' there is this instant execution by police that happens. Nobody is shedding a tear for the three terrorists shot 8 minutes into their killing spree, however, would the police have been able to apprehend them if they only had their batons?!? This was the situation in the UK until recently, if you 'went postal' in some regional town it would take a while before officers with guns would arrive. You would have hours to escape bullets. But now? 8 minutes.
I also imagine a world where no terrorist gets tried in court. Death awaits them before they get that far and the quaint notion of justice before a jury goes by the by.