[Dave S]

On the other hand, signing up for phone service is putting out the welcome mat.

Signing up for a phone services is NOT equivalent to putting out the welcome mat. It's equivalent to putting a door on your home so you and your guests can come and go without having to crawl through windows.

[palmer]

The service is an open door, it doesn't restrict who can walk through it.

[NittanyLion]

This clown thinks the existence of the phone itself is an invitation to all who want to call you. By his logic if you build a home anyone can just come on in at anytime - and you have no recourse to stop them.