I have a land-line and have had it for years. I still hve a phone that works off of that land-line and does not need electricity. The primary reason is that I live in an area that is frequented by hurricanes and while I have lost the ability to use a cellphone due to not being able to charge the battery or the cell towers are down or the cell towers are overloaded, I have never lost the use of my land-line. Now just because I have a land-line does not mean that I would ever give that information to anyone in this business. Of course, that is my choice and we all have a right to make a choice when it comes to you personal level of security and that works both ways between the provider and the hobbyist. Free will is such a wonderful thing.
Another reason is that I love fucking with tele marketers.