Choose Domain Name Servers | Talk Web Hosting

I own and operate a small web design agency. In the past, I used my primary business name for the name servers of clients whose websites are hosted. My business is growing and I'm worried that using my main business name in the name server will draw extra attention from junk and hackers via whois searches on my client sites.

Do you use your main domain for your name servers? What do you think about using a "dummy" domain, which does not contain a hosted website, for name servers? that is or something?