Be polite. Be specific. Inform them you won't be buying their product or service, and you will be making sure friends and neighbors know about this as well.
For those of you who have seen the program, please list any of the sponsors.
You should also POLITELY call your local NBC affiliate, because they get the revenue from the local ads.
Also, it makes affiliates nervous when people call, and THEY will also call NBC.
I expect everyone on this thread to be busy tomorrow.
FGS