So we're gonna take the word of a couple armchair detectives over an actual NASA engineer who worked on Curiosity? I'm sorry, but no. He also does openly admit that 1-2 of the reactions, after further inspection, could've been faked, but those were the ones submitted by his neighbor, which he claims he didn't know were faked, and he has since removed from the video.
To claim that the whole thing was faked is not only misleading, but also insulting. I know Buzzfeed loves clickbait titles, but I hoped better from HackerNews.