Good advice if you plan on mimicking another site to fool the public into thinking it's an already trademarked site or violating their intellectual property by using trademarked banners, photos, text, etc...
Really irrelevant advice if you plan on buying a generic domain name for a generic purpose that THOUSANDS of sites are already doing.. Yeah online porn tube sites for example.
Sending letters means nothing, spending 10s of thousands in court to get a domain name and actually succeed is entirely different. Ask Ford, ask paypal, ask ebay.
