For my high school we only had scanners on external exits that kids came in from the outside world. There were no scanners on doors to the outdoor fields that w

For my high school we only had scanners on external exits that kids came in from the outside world. There were no scanners on doors to the outdoor fields that were inside the perimeter fence. So kids went out for football and PE and band and whatnot without passing through scanners. And even if there were scanners it’s pretty easy to hide a knife in football equipment or a tuba or something.