"Another step they should have taken, never did...get rid of all the big blue mail boxes that can receive a largish package. (
Every so often pipe bombs go in there)"
What a liar.
No, they don't.
Here is a quote straight from the Postal Inspector's site.
It is important to be alert for suspicious parcels, but keep in mind that a mail bomb is an extremely rare occurrence. To illustrate just how rare, Postal Inspectors have investigated an average of 16 mail bombs over the last few years. By contrast, each year, the Postal Service processed over 170 billion pieces of mail. That means during the last few years, the chances that a piece of mail actually contains a bomb average far less than one in 10 billion!
I've been working for the USPS for quite some time now, and I have never heard anything about any mail bomb found in a collection can. The closest it comes involves a grunge band musician & pot activist who put pipe bombs in people's private mailboxes circa 2002. He was strategically placing the bombs so that a map marking the explosions would form a smiley face. The bombs weren't going into collection cans.