It's a bit trite, but also true -- a significant portion of reddit is totally made up. It's worse than it was a few years ago, but I have no way whatsoever to measure it. Occasionally I bump into youtube videos which are just narrations of reddit posts which tell some interesting or controversial story. They all really sound fabricated. There's no way for me to know with certainty, but I think extreme skepticism is the safer assumption for any large reddit.