Received an email reply from Bruce Johnson the news director.  Here are several of his comments:

"A website search reveals "teabaggers" is a "common" term frequently associated with the Tea Party Movement.  The other meaning of the word he gave no thought to."  He then gave me a link to a "conservative" news site, PR Newswire Service, that noted the term was included in the New Oxford American Dictionary new words.  Also included in the new words were "death panels" and "birthers".  

He states, "we got a few complaints in the morning but it got quite busy and they were unable to take it down until the afternoon."

"WATZ" remains committed to a position of neutrality."

On my charges of being biased he replied "to be biased would have been to ignore the group altogher."

When I emailed him back I noted that he was quite right about the MSM bias ignoring the Tea Parties as last year there was nary a mention of it.  I also told him he crossed the line of neutrality when he used "Teabaggers" in the head line.