As far as I know, ICANN wants every domain owner to put their contact information into the WHOIS database. I'm fine with revealing my real name, but having to submit the address where I live seems like a privacy killer to me. Wouldn't ICANN be satisfied with a general delivery address? Do they actually contact people by paper mail without a prior notice?
Of course, I know about the existence of WHOIS privacy services. Let's assume I don't want to use one for some reason.