This question has more relevance for cities and suburbs, especially given the occasional social disruptions like the NOLA and London riots. Unlike shotguns, rifles can reach out and touch a looter with an incendiary device in hand without the defender having to leave cover and concealment. The same threat of long-range tag ought to keep riot police a little more restrained when dealing with peaceful, lawful locals.
(For the curious, this FAL was home-built on a Coonan receiver.)
Bayou Renaissance Man is of opinion that we will see much more unrest on a global scale very soon. While non-ballistic preparations are more likely to be helpful, a rifle or two per household can’t hurt…provided proper backstop discipline is observed. One advantage of shotguns used with buckshot is that neighbors are less likely to catch an errant bullet.