No offense, but how hard is it exactly to build your own social news 'platform' ? If I were starting a social news site, I would rather use an open source packa

No offense, but how hard is it exactly to build your own social news 'platform' ? If I were starting a social news site, I would rather use an open source package like pligg that I can modify to my hearts content than use any of these so called platforms </end rant>