You are just trying pretty hard to NOT give them credit probably because they were “tribals”, here you go and start pondering if you should do little more research instead of coming to conclusions based on one guppy’s post which approves your line of thought:
10 airports install body scanners - USATODAY.com
This article shows 10 airports who got these scanners, don’t forget to check the date. Now do you believe that only six airports have these machines?