I had no idea but in this question I found out I do not own my domain if I use a private registration service http://serverfault.com/questions/82556/domains-and-private-registration-services/
I have 2 sites I expect to get high traffic. I also don't want people calling my house and I prefer not to be known as the owner at the moment (I expect smart trolls on my forums).
I want to know what I should do now, I am worried if I try to register my domain later on that the price will be higher once the domain gets more hits. Is this a possibility or will it always be 7/8 dollars? I am worried if my domain gets traffic that the private registrars will sell it to the highest bidder. So how might I ensure it's mine so it isn't sold to someone who is not me?
Finally, the least of my worries is someone calling me at my house or mailing me junk by getting my info through the whois service. What should I do about that? I am thinking I should just renew the 2 or 3 domains I want and not use privacy.