Has Facebook really defeated the Nazis?

Facebook is many different things to many different people, but surely a social networking should be just that, social. Sure, there will always the odd group with a less than pleasant agenda, although usually these take the humour route rather than being downright nasty. So while an anti-Microsoft group might not be all hugs and flowers in intent, it is not in the same league as one proclaiming that members should 'Turn Gypsies into Fuel' for example.