Why Is The Twittersphere So Racist?

At first it was just a nuisance. It was nonsensical sharing about what someone was having for dinner or what their meaningless thoughts on the Grammy's were. Then everyone was attempting to become a twitterlebrity by typing some vaguely witty remark that then would travel the twittersphere in hopes of getting retweeted by some B-list celebrity who has thousands of followers. What a great goal.
But now twitter is just outraging me and my case against twitter just keeps getting stronger. What is it about this social media site that lures its users who are prone to over-sharing to the false sense of security that they can say whatever horrible thought they want and hide behind their twitter handle?

A little bird told me you're a racist.

And it just keeps happening. Racism is running rampant on twitter. But at least people are facing actual consequences for their virtual world twacism.
Today triple jumper Voula Papachristou was expelled from Greece's Olympic team for comments she made on Twitter mocking African immigrants and expressing support for a far-right party. Earlier this week I mentioned the UK student who was jailed for his racist tweets about a school athlete. And earlier in the spring, Boston made headlines when many racist tweets against a Washington Capitals hockey player scored against the Boston's precious Bruins.
The trouble with racism on twitter is that the hate travels fast and far, which I suppose is the big draw if you are a bigoted jerk who wants to share your spiteful doctrine with the masses. In many cases, like the one of former Olympic hopeful Papachristou, the culprit when caught tries to say it was a misinterpreted joke. Please. Racism is racism. Even when it's said in a quick 140 characters or less.
Ok, I'm going to stop twitching in anger over tweeting. Why can't we all just be like the pandas: