The UPS guy rang my bell today because he had a package for me. (Sorry that sounded sexual.) While I was signing for it, he said he had two more packages for my neighbors. (Sorry again.) Because I was feeling nice, I accepted both and put them by their door.
If they don't put a thank you note on my door and assume I'll sign for another one of their packages again without asking, I'm going to write them a short letter about etiquette, tape it to an Emily Post book and put it by their door.