To get an idea of just how biased media has become, try to imagine the media reaction if the Tea Party acted like the Democrats and unions in Wisconsin and other states, and if far right groups comparable to the far left/socialist groups were participating, and if the Tea Party had become violent.
If the Tea Party acted like the Left, there would be congressional investigations, and Chris Matthews would put together a special regarding Right Wing mobs attempting to take over state governments. Every headline would have "extrem right-wing" and "violence" in it.
The mild and mostly favorable coverage of the union protests is indicative of media bias. It's really an amazing contrast.