Focus, people, focus.
RE: the prop thing: I don't have a lot of sympathy for people who take those pics and post them on social media expressly to garner attention. You are not advancing anything other than drawing attention to yourself. The Columbine tidbit about not being is interesting. People forget, Eisenhower was president when the AR-15 was invented, and it has been exclusively sold to the civilian market since 1964. It didn't magically or suddenly become more deadly. The issue is more than just the weapon.