The point is not that there are a few bad apples out there, but that Reddit (and other crowd sourced media) have limited ability to police/prevent such actors and their actions. I posit that the editors of Newsweek and other assorted old media have more control over their reporters both before and after the story is published.
http://www.usatoday.com/story/news/2013/04/25/boston-bombing...
Surely, this a is sin greater than whatever Newsweek may have committed.