SWORD Smartphone Weapon/Explosive Detection Scanner

It is really cool. However, I'm 50/50 on it. It would be great to use in schools, school events, concerts, and airports. But what about other instances where someone can legally carry concealed? Or, it picks up on something that is not a weapon or explosive and people over react?

I am suspicious about the accuracy of such devices. I would use them very carefully and only in conjunction with other factors.

It is a violation of our 4th amendment rights even if you aren't doing anything dangerous territory