[Wonder Warthog]

"So mail it home wrapped in Mylar (Mylar does work to confound info doesn't it?)."

Only metalized Mylar. Regular Mylar is just another plastic, and transparent to radio waves. Think "Faraday cage".....same principle. Or you can just get an aluminum wallet. There are a lot of preventives out there.

[Chickensoup]

Only metalized Mylar

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Remember folks, metalized mylar. Buy it by the truckload and trip a DHS investigation.