They work in a fashion in a country with not many guns like here in UK , but it does not stop violent crime it just means other weapons are used .
and Shooters usually target non gun places or gun free zones , dont see many trying to take on a shooting range or something .
Me personally i like guns i like some of the stories i read of women stopping rapists and people preventing robberies .
i like the stat that over a million crimes are halted after the "victim" produced a firearm not even firing it .
There are i think more good than bad people so lets arm as many good and out fight the bad .
Ill go to the states one day specifically to fire some real weapons might accidentally miss the flight home too .