Littlesheep, your question is "how to escape from the United States without encountering a body scanner?", correct? If so, here's a couple of solutions for you...

Sail a boat to Cuba. You will find that airlines incorporated in civilized countries serve Havana.

Alternatively, I don't think they have scanners at MEX, so if you live in CA, AZ or TX, there are many standard coach services and a few luxury coaches that will get you to Mexico City, and you can fly onwards from there.