[bseo]

That post uses Domains by Proxy as an example, which is an awful service. Towards the end of the article, Dynadot explains the whois protection service THEY offer themselves. That's what Namecheap (and other registrars) does and it's what I've always used.

I can tell you for a fact that I receive a lot less email spam at the email address I use for whois, because Namecheap changes the address (which forwards to mine) listed every other day. Also I don't get any snail mail junk, although this was never a big issue.