Gun control can indeed prevent future incidents that puts lives at risk, but it depends on wether the public has experience or not, and wether they really do have good intentions. Pro:
-less violent occurrences like school shootings
Con:
-How would the public react? Good or bad? Would harmful riots occur?
-How could gun smuggling be stopped if it did increase when guns are illegal?
-WHat if a store was robbed with a knife? How would the clerk defend him/herself?