My apologies if my statement sounded crass, but it's the harsh reality. As someone who's survived a school shooting, I would much rather go through a small inconvenience than ever be put in a situation like that ever again. I know the room check is not really going to do much in preventing such an attack, but even if the procedure prevents ONE person from re-thinking their choices, I'm okay with it.
The bigger issue is the fact that we even have to implement something like this due to America's gun policies (or lack thereof), but that's a discussion for a different thread.