Because of the many threats we all now face, i think there is an over reaction sometimes by the authorities, probably erring on the side of caution, you can understand it in some cases, as gratuitous violence seems to have become the norm, knives, bottles and in some cases guns used by those who appear to be normal, but whose brains live in the fantasy world of the big screen, where the injured and shot jump up and carry on and the drug addled dont know what they are doing.