I check the whois records for domains reasonably often. Whoisguard type systems are commonly in place to protect the identity of the domain owner. No problems there.
What irks, though, is the people who give completely false information… like this one where the info is incomplete and gives an Australian address yet I know that the actual owner is in India. By saying he’s in Melbourne he aquires a western credibility he perceives as superior to his Indian identity.