That one's more pernicious; top-level registrars usually demand that it be accurate and might threaten to take your domain away if someone reports that it isn't. There are whole companies which specialize in the service, "we'll be your official DNS contact so that your personal data isn't leaked through the WHOIS database," but the last time I checked was I think two years ago, and at the time the service-providers for this were either (a) really shady or (b) really expensive. It looks like the prices have come down a good deal from where they used to be, though.