The problem is not limited to just the broadcast media. Ethical lapes are all too common In the academic/ scientific journals. If our "scientists" can't behave in an honest, ethical fashion, what hope is there? The problem is caused by those on all parts of the poltical spectrum.See this from the NY Times.
"The senior author of a widely covered study suggesting that gay political canvassers could change conservative voters’ views on same-sex marriage has asked that the report be retracted because his fellow author failed to produce the raw data. The study appeared in December in the journal Science, and numerous media outlets, including The New York Times, published articles on the findings.