So it isn’t a Federal crime to tamper with the mail if you’re “just lazy?”
Yes it is a very serious Federal Crime and has some serious consequences.
Under the U.S. Code, a Postal Service officer or employee who “unlawfully secretes, destroys, detains, delays, or opens any letter, postal card, package, bag, or mail entrusted to him or which shall come into his possession, and which was intended to be conveyed by mail, or carried or delivered by any carrier or other employee of the Postal Service” is subject to a criminal penalty of up to five years in prison, a fine, or both.