I was browsing digg.com today (as I usually do) and I stumbled upon this little gem of a submission/article: http://www.digg.com/tech_news/Why_Digg_is_Blocked. Upon viewing the page, it turns out that the owner of the site has decided to BLOCK digg.com, Netscape, Redit and StumbleUpon because, get this, users openly endorse Ad Block Plus, a plug-in that blocks advertisement on web sites