[chickendippers]

You are legally obliged to provide your contact information to the whois registry, failure to do so may result in your domain name being revoked (although I've never heard of it happening).

Many domain registrars (myself included) provide a free privacy protection service that hides your contact information perfectly legally. If your registrar doesn't provide this you can transfer to another company.

Alternatively you can try putting fake contact information in and hope that your domain name doesn't get revoked. Again, I have never heard of it happening, but it does state they have the power to do this in the small print.