To reduce violence requires that everyone, regardless of their gender or sexuality, race or religion, commits to that purpose. Canada took the fundamental step of making all genders, sexualities, races and religions equal. In practice, it means bringing our children up to exalt non-violence as a way of achieving their individual and collective goals. 

Any act or omission that facilitates unlawful force against others should be thoroughly investigated, then either rectified (preferably) or prosecuted. 

Humanity is moving on from its primitive origins. Why not be a part of a peaceful revolution rather than its inhibitor? Reject the use of violence in your family, your community, your country and in the world at large. That's not just an appeal to your better self, but to your enlightened self interest.