OK, so what if somebody says they want to air a documentary that they claim is THE TRUTH. What happens if it's not?
You work to expose it's falsehoods, as many, in both film and on the net, have done in the case of Moores' F9/11. (Example:
http://www.centigrade911.com/)
We can't be silent about the truth because we're afraid the other side might lie. They (e.g. Moore, Rather) are
already doing that.