Provided the theoretical "gay bomb" is developed and is created in handy spray form then you would not need guns anymore. A singly spray to an antagonist of the same sex would turn them from a criminal seeking your wallet to a love-struck puppy seeking your approval. If used by riot police during a demostration or against an opposing military force then the command structure and organisation would quickly come apart, descending into a quagmire of sexual pandemonium fuelled by intensive infatuation.
General disarmament being for the present entirely out of question, a proportionate reduction might be recommended. The safety of any country and of the world's commerce depending not on the absolute, but relative amount of war material, this would be evidently the first reasonable step to take towards universal economy and peace.
source - http://refspace.com/quotes/peace/5