Well it seems that Dateline NBC has been caught in another scandal of making news instead of reporting it with some sense of honesty. This time it seems their reporter tried to secretly record hackers admitting to criminal activities. I have heard reports that NBC is faltering in their ratings for its liberal slant.
http://blogs.zdnet.com/Ou/?p=653


I can recall what may be their most controversial scandal involved GM Motors.

This is one commentary about the Dateline NSACAR scandal.
http://www.postchronicle.com/commentary/article_21213528.shtml
This is NASCAR's response
http://www.nascar.com/2006/news/headlines/cup/04/06/nbc.dateline/index.html