There are more and more stories about employees being fired/disciplined for improper use of social networking sites.  The most recent was the waitress who complained about the customer who only tipped $5 in her Facebook update post — she was fired.  Others include:

• The firing of a Dallas radio producer who made negative remarks about Spurs fans in a Tweet.  (He also happens to be the pitcher who served up Barry Bonds’ 756th home run.)
• Ex-Kansas City Chiefs’ running back Larry Johnson’a tweets that cost him his job.
• The non-profit employee who had a sex blog.
• The Scottish politician who was forced to end his campaign because of Twitter rants.

Do you have any other examples?