As big of a hardship as going off the grid for you would be. Also FYI, according to the latest reports...it was not even an AR15. I am as interested about what you are doing in your bedroom as I am interested in if the next person owns an AR15, or assault rifle, or toothpick (in case you are wondering, I really don't care). When someone tells you what gun they deem worthy of you having, I will let you know what you are allowed to do in your bedroom. In your example, I might choose to shoot an assault rifle for entertainment and distraction, because it wakes me up, and because it is cheaper than scuba diving or flying a plane. For mowing down, I can do a lot more damage with a car....add some manure and a lot more. Additionally, it is not the military's responsibility, nor any police departments to protect you or your family. Their job is to take notes and investigate and catch the bad guy...not prevent criminals from doing harm. This has been proven court case after court case.