In fact, most people who do ask for a location require only your postal code. I'm sure it must be for missionaries to come by. This may be another reason that missionaries are having a hard time. In the States, anyway, Americans have become understandably paranoid about giving out such things as addresses. I bet not too many people here give the LDS church their personal info anymore.
But, yeah, I'm getting fed up with all sorts of businesses wanting contact info they don't really need. I've learned to tell the retail clerks, "No," when they ask for my phone number or postal code. And I have a Gmail account I use exclusively for online purchases.