Take on the "Mail it home kiosk"

As I went through the security at Columbus airport this week I saw a big Mail it Home Kiosk which allows you to send the stuff that security would have taken. I guess I appreciate the idea that you can save your vitamin water, large toothpaste or AK47 but what is odd is that they have this thing located AFTER the security all the way down the hallway. So what happens here

TSA guy "you can't take a grenade into the airport"
Terrorist guy. "sorry, can I mail it to myself?"
TSA guy. " sure take it down the hall next to gate 67 and mail it back to yourself and no funny business"
Terrorist "no problem buddy"