OK then let me be more gentle with you.
There have been
161 different gun shootings (notice I didn't say "school shootings". Some did not have injuries) since 2013.
There have been 351 mass shootings in general in 2015. Even if "the odds" are against you, does that mean you shouldn't be prepared? You're only guff with the situation is because there might have been a man in camo roaming the halls. That could be a potential situation that could (and has) actually happened. Should your kid be scared? He should be aware of what's going to happen and be able to respond accordingly, and that's not even just at school. And if you sat down with him and explained what happened, I'm assuming he'd be smart enough to understand the difference between an actor doing this and the real thing. You also don't know if the school had prepared the kids as well - what if the school had an assembly to tell the kids what was going to happen? Would you have such a hard time with it then?
You act like this (now hypothetical) "actor" roaming the halls is going to shatter the innocence of your child and he'll be forever scarred. Dude, kids are far more resilient than that. Also, people go batshit crazy all the time and shoot shit up. The fact that I have to point out that there were 161 different shootings on school properties since 2013 should be enough to cause mild alarm to you. Do I think your son needs to wear a bullet-proof vest at all times? Of course not. And that WOULD scare him. But all he has to do is turn on the news and see that shootings are happening all the time, everywhere. We have a serious gun violence issue in this country.
I'm also not one for "fear culture". For instance, I think kids should be able to play on a playground without constant supervision, yet people get arrested for not supervising their kids at all times. I think that's completely idiotic. But that doesn't mean I wouldn't tell my (nonexistent) kids "Hey, if a strange man comes up to you, RUN THE FUCK AWAY and get help." I think the woman that got bitched out for letting her kid take the subway by himself in NYC was fine, too. But she had prepared him for what could happen.
There are a lot of things that are even less risk than a kid going to school, yet we still prepare for it.
I'm also sorry that my first post sounded harsher than it should have. It just boggles my mind that anyone wouldn't want their kids to be prepared for as many situations as possible while still being able to live their lives. But I also have a hard time thinking a 5 year old is going to be traumatized by a man roaming the halls of a school looking in windows while they're explicitly told this is a drill and isn't real.