Blogs and Jobs

Looks like some companies don’t like people blogging and are actually getting fired.  I have heard of some stories about people getting fired because of blogging but her is an article about three people (flight attendant, Kinko’s employee and a web designer) getting fired because of blogging.,1284,65912,00.html 

Whatever happened to freedom of speech and expressing yourself?!  It’s their own personal opinion and I’m sure act professionally in a work environment.  Why should they get fired for something they did off work hours? Like I said…whatever happened to freedom of speech?