I got tired of being spammed at the e-mail address I had to provide to my registrar so now I have my mail server delete anything sent to that address unless it comes from my registrar.
I got tired of my snail mailbox being clogged up with useless junk that was clearly the result of my whois details. So I bought a post office box. I visit it once a week to drop off a copy of my home/office backup CDs and throw away all the junk mail.
Finally, I got tired of being called at home during supper. So for a minimal charge I added an additional phone line that does not have a phone connected to it. Call all you want; I can't hear it so I don't care.
The DBA is approximately US$35/annum. The phone line is approximately US$120/annum. The post office box is somewhere around US$50/annum. All told it costs me a little over US$200/annum.
It's amazing what we have to do to maintain some semblance of privacy online.