If you run a company and have your domain registered under the name of that company, having your Whois information public might actually do your business some good. If something ever goes wrong with your website, Internet-savvy customers will still know how to contact you.
But if you are an individual or someone running a controversial website, having your name out there for everyone to see, might make you uncomfortable. Unfortunately, Internet rules govern that the contact information on your domain be current (i.e. your present address, reachable phone number, etc.).
There are some companies, including many registrars that offer domain privacy for an additional fee. It is, however, unclear how much privacy they actually provide. Some of these companies have been known to hand over contact information of registrants with little persuasion from law enforcement or other government entities in various countries. If you absolutely need privacy and have no other options, the best thing you can do is not use your home address, phone number, or your primary email address.
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