This is exactly what parent is describing. If you’re on a suspicious person list, or happen to cross paths with one, your mail is likely going to be scanned. I

This is exactly what parent is describing. If you’re on a suspicious person list, or happen to cross paths with one, your mail is likely going to be scanned. I can’t find the source now, but also once read the NSA can intercept a package, modify the contents and send it’s on its way without even a delay in the tracking.