I agree with you, Kimba, on this being more a community problem vs a school problem, and why this legislation in question, won't have much of an effect on the community, as that's not its design. It's design is specfically to better defend the children in schools from would-be mass killer want-to-be's
Bottom line is that the "bad guy" (be it a gang member, pathological student, home invader, mugger, rapist, murderer, or terrorist) has no intention of abiding by any law already passed or being proposed, which is why "gun free zones" are nothing more than a PC pipedream. The only folks that are going to abide by such regulations/laws is the already law abiding citizen
What may have a better impact, although it'll fuel the anti-gun anti-2nd amendment all the more, is more legislation to incentivize and train more law abiding citizens to safely carry a firearm....if they chose to (don't want to confuse anyone that I want to "arm everyone"). Such training will lead to situations where bad guys are confronted with a firearm almost immediately, vs getting a 5+minute head start in their killing spree. That's one answer, although I'm open to other suggestions