As knowledgeable gun owners, Gun Tests readers know that paying lip service to restrictions and limitations isn't the answer. Guns aren't going to magically disappear. But gun owners, in particular, do have a responsibility to report erratic and potentially dangerous behavior in their communities. Because we have access to guns, it's up to gun owners to be the front line of responsible gun ownership and report when we see behavior like what Nikolas Cruz exhibited. We can't stand on the sidelines and say, "It's not my business" and move on. The trouble is, will we get law enforcement to follow up effectively? That clearly did not happen in the Parkland event.