When you want to get good rankings for a particular keyword in Google, it's common practice to buy lots of backlinks with that keyword as anchor text. However, I can't help but wonder ... isn't that the most unnatural thing that any search engine could ever find?
If lots of sites gave you links all naturally, the chances that they all used the same anchor text is rather slim. And when you factor in the fact that your anchor text is amost never your company name - that makes it near impossible.
It's one thing if a good chunk of people who link to DaniWeb do so using "DaniWeb" as anchor text ... but it's quite another if suddenly every major backlink I got had the anchor text "computer help".