Finding out someone’s address used to be kind of hard — or at least took some effort. I’m old enough to remember a time when you had to grab that brick called the “yellow pages” to search for someone’s address. We were taught how to do it in school: start with their last name and then run your finger down the teeny-tiny print until you found the first name that matched the person you were searching for. And, even then, the yellow pages only included people in your immediate area. Want to find the address of someone in New York City? Better get your hands on their phone book.