The obvious answer is that you're just not going to hear about something like this happening at some obscure webapp. These sites are also started by young prog

The obvious answer is that you're just not going to hear about something like this happening at some obscure webapp. These sites are also started by young programmers who tend to have a libertarian, naive tec-utopian bend. At some point they notice that the wisdom of crowds is usually anything but, or their girlfriend/daughter/advertiser explains to them how the 600th image with a racist, misogynistic attack on your CEO isn't just a shining beacon of free speech. Or it doesn't actually happen, and at some point you just get a few disgruntled ex-emps running to Gizmodo because they can only think of CENSORSHIP!!1! when you act on the assumption that the NYT is higher quality than Drudge.