Here is one example of many that has and will happen. A government contractor got fired for racist and hateful Twitter statements against the U.S. government. Although he is Asian (and he should get no leniency for being non-white), it is something a white supremacist or Freeper or Dittohead would easily engage in.
Racist Tweets Can Get You FiredFrom the “none too swift” files, David Le was fired after his twitter messages about his slacking off at work and hating Anacostia surfaced.
The D.C. Department of Employment Services fired a contractor who was working with youths in the city’s summer jobs program after officials became aware of messages on his Twitter site that Anacostia is “ghetto” and that he was loafing at work.[...]
Reached through Facebook, Le declined to comment. In a Twitter message, he said he is Asian. The profile photo shows him shirtless and in sunglasses. Hobson said he began working on June 10 and was paid $13 per hour to oversee participants in the Summer Youth Employment Program.