What Good Can a Handgun Do Against An Army?
http://www.freerepublic.com/focus/f-backroom/2312894/posts
What Good Can a Shotgun Do Against An Army of Crazed Rioters?
Answer: Bring them to a halt, quickly!
This gives the locals time to buy up some shotgun ammo and determine where the best line of fire would be for various situations.
When the action is about to take place, beginners will talk caliber, professionals will discuss tactics.
If the city council makes it law that all marchers will be required to put forth liability insurance before a permit will be issued and this is enforced by the towns business and property owners standing firm with loaded shotguns, there will not be a riot.