lol I forgot to add the purple. Sorry.Personally I think one armed guard per school suffices.
The point I'm trying to make is simply that people slip through, it doesn't mean you need to add more guards, or surveilance, or freak the heck out.
People are freaked out enough as it is.
But if I noticed my kids' school turning into St. Mengele's Stalag High, I'd be looking for a different school at least.