If you take it literally, yes. But you are being too literal.
Judges are like that as well "too literal". Haven't you people heard of situations of bank mistakes, people taking the money and running? Do you remember how they didn't get to keep it and did jail time for attempting to do so? The only difference here is the value is trivial in comparison, which means it's often considered a small enough amount that it's not worth locking people up for their dishonesty.
That is a lie, and you are a liar. The difference here is that someone has put a physical item in the mail, and sent it to you, and now you have it in your hot little hands. Absent an agreement to send it back, it is now yours as per U.S. law, as it is illegal for them to have actually sent you the package to begin with!
Now, this didn't happen in the US, so that's totally fucking irrelevant. But still, right now we're talking about US law, and it says that if someone sends you something you didn't order, you can keep it, send it back, donate it to charity, or indeed stick it up your arse if you're not violating any sodomy laws or other ostensibly unconstitutional but still-on-the-books bullshit.