My eyes went wide when I saw the grenade.
link because apparently I’m not allowed to post pictures
From the TSA blog:
Inert Ordnance and Grenades etc. - We continue to find inert hand grenades and other weaponry on a weekly basis. Please keep in mind that if an item looks like a realistic bomb, grenade, mine, etc., it is prohibited - real or not. When these items are found at a checkpoint or in checked baggage, they can cause significant delays in checkpoint screening. I know they are cool novelty items, but you cannot bring them on a plane. Read here and here on why inert items cause problems.
I totally get why you can’t carry these on airplanes but it goes back to your initial point. “Does this actually make us safer”. Probably not.
