Ah, the bad science based on "Well, I heard from someone..." and "or so I hear..." and "supposedly"...
These are terrible criteria on which to make a decision. Those of us old enough to have lived through the Apollo program remember it clearly. And no, many of the astronauts did not die shortly thereafter. Most are alive today.
Crackpot conpiriacy theorists who are bent on "proving" these ridiculous ideas quite simply do not have actual science to back up their notions of fantasy. Quite commonly you'll hear stupid things such as "why are there no stars in the skies behind the astronauts in the photos taken on the moon surface?" Well anyone with only a rudimentary knowledge of photography can easily explain the exposute latitude that prevents them from showing.
Also, the depth of the stories of Apollo are too deep and varied to be a fabrication. Stories of hoaxes and folklore are subject to constant change and revision. How many variations of "bigfoot" have you heard? To create a hoax of this level of precision would be far more ponderous than actually landing man on the moon. There are simply too many events:...Al Bean getting hit on the head with a camera on splashdown...Al Shepard hitting the golf ball...Dave Scott dropping the hammer and the feather simultaneously and them hitting the ground similarly...and you'll notice that the astronauts' stories have not changed over the years. Folklore changes with time. The Apollo stories have remained absolutely unchanged.
Then we might be asked to consider the following: What could the purpose possibly be for Apollo 8 orbiting the moon without a landing? It would have been just as easy to "fake" landing in 1968 instead of waiting a scant 8 months later in to do it in '69. And then what would the purpose have been of Apollo 13? If the whole thing was a "hoax" to win the space race, why would America blight its own image on the 3rd lunar mission? It quite simply does not add up.
I suggest a visit to
http://www.badastronomy.com/index.html for a website that does not tolerate bad pseuduo-science.
My favorite story from a few years ago was when a crackpot ambushed Buzz Aldrin and accused him of faking his moon walk. Aldrin, in his 70's, punched him squarely in the face. Then the idiot had the nerve to try to press assault charges against Mr Aldrin. The judge laughed him out of the courtroom. And rightfully so.
If you choose to question the events, then be thorough in your research. Weigh ALL of the evidence you can possibly get your hands on and beware of seemingly convincing arguments. I consider that in my work as an actor it is my job to give convincing portrayals of often fictitious characters and events. If I do so outside of the confines of the theatre, where there is a mutual agreement between performer and audience to suspend disbelief, then I have abused my persuasive skills.