That is very true, but I think it at the same time you can build your reputation by utilizing other social networking sites. For instance, on the site I work on, eHow.com lets users be able to write out their own How-To articles and flaunt their expertise. Content on eHow are indexed pretty high on search engines and is also a great way to drive traffic to one's blog site or website. All around, it's just a good way to brand yourself as an authority in something and have your name on a credible site.
