SCT
Security Directors
I would have thought the most obvious targets for theft would be farmers. Most farmers have a shotgun, most use it to shoot rabbits on their own land, so its not hard to figure out who has a gun. The time it would take for police to respond in rural areas, would make an alarm pointless.
Perhaps the best deterrent would be much longer sentences for possession of an illegal firearm, but then comes another problem. If you give people 10 years for possession, they're more likely to use it to help them escape rather than getting caught. Even if there's a minimum of 20 years for using it, the sort of people that will gamble on committing a crime will take the gamble, rather than face the 10 years.
Banning guns doe nothing to stop criminals having them. All it does is remove the means for innocents to defend themselves. Criminals do not think of the consequences when they commit crime. If they did, they wouldn't do it. The threat of long incarceration does not deter them because they think that they wont be caught