Why is there so much anger around?!
This is a strangely common complaint among conspiracists. I think it really translates to "Why are you so vehemently denying that things are the way I wish to believe they are? Why can't you just let me believe what I want, and persuade the rest of the world that this is true, without getting any of that nasty old reality and evidence in my way?"
Even if the moon hoax idea didn't smear real, live people as liars and cheats, denying the realities of the world can lead to serious consequences. People who swallow the idea that the aerospace community is a bunch of lying scoundrels will often, say, have less problem swallowing the next idea, that the medical community promotes vaccines even if they are harmful, because hey, science and industry are evil, and that's what they do.
If you're going to stand up and say, "I believe stars are living phosphorescent creatures who swim in a dark sea over our heads," don't complain about "anger" when people try to explain to you how that just can't be true.