Does blocking social networking sites will increase traffic or website ranking in search engines?
Social networking sites can INCREASE your site’s traffic… Why on earth would you think that “blocking” them would help you get traffic? Social networking in general can help to build up traffic to your site, but do VERY little to help your site’s rankings in the search engines UNLESS 1) you have a huge following and some of your followers begin linking to your site from their web sites or 2) you have something that goes viral on because of social networking and people begin linking to your site. It’s LINKS that you get through social media that cause your pages to rank better in the search engines’ organic rankings.