If you have ever worked inside the post office.........you wouldn't ask that question.
I know what packages go through. The last thing I want is for them to be dumping a container full of mail and using the pick to pull the mail out of the mail transport equipment and poke a big hole in your package. Trust me, it can happen. I've seen it probably... literally a thousand times. I want you to get your package fast, and in tact.