Wow, that's a bit retro. Usually these days you hear people talking about new conspiracy theories- "9/11 is was an inside job", "global warming is a hoax", that kind of thing.
All of the stuff about the moon landings being faked had been very thorougly debunked by astronomers. Here's a Guardian article about it.
http://www.theguardian.com/science/2009/jul/02/apollo-11-hoax-myths-debunked
You also might want to check out Phil Plait's Bad Astronomy site.
http://www.badastronomy.com/bad/tv/foxapollo.html
If it were a hoax, consider just how many people would have to be in on it, and manage to keep it quiet all this time.
I agree, you can't keep everyone quite...it's not possible.
They did go, but they got a nasty surprise.