Just a thought and a bit off topic--why will mail carriers put a note in your box saying they can't deliver the mail because the box is blocked?!?! Do they fold the note like a paper airplane and sail it into the mail box?
I think it's to get their point across. My son blocked my mailbox once in the evening, intending to leave shortly after. The vehicle wouldn't start and he had his wife pick him up. The next day I had a note from the mailman about the blocked mailbox. I couldn't move the vehicle because it was locked. Son had to come and put it in neutral to move it out of the way.