Not when you're dealing with people having no greater purpose. The majority of these people are just out to cause trouble and loot knowing there is no real consequence. If looters were shot on sight, these riots would have been over days ago. I realize it isn't a realistic solution, but it would be an effective one. I'm not too sure it would work. While it would quell most of the violence, it seems barbaric which would be, in my opinion, stooping to the looters' level. As long as these rioters aren't using guns of their own, I don't see the need for riot police to use their own guns on them. Over the long-term it would create more dissent among the populace than using other methods of riot control.