Technically, nobody should be allowed to use these services anyway: domains must (by law) let people who use those domains know who owns them, so when that domain is used to attack you, you can take legal action against the owner.

Unfortunately, ICANN is not tough enough - their rules allow them to drop your domain if you fake or hide your whois info.

It is all a big lie anyway - no matter what "whois" service you use, everyone who wants to send you email still can - that's the point of it - it's a contact service.