Have you texted your textdoor neighbor?

The cool kids are texting their textdoor neighbors-people whose phone number is a digit higher or lower than their own-and sharing their adventures at r/textdoor. About half the respondents seem incapable of grasping the concept and keep asking "how did you get this number?" Many conversations are a bit weird and stilted, expressing the paranoia and suspicion of modern internet life. But someone is going on a date, too!