Jesus. Melodramatic much?
I've been a low level Wikipedia editor for many years. I have edited and written a smattering of articles, and it has never been a waste of time, and certainly not dangerous to my SAFETY.
I don't know if anyone has gotten any value from my articles, but I have. I have written articles to help study for exams back in college, I've written articles to help my keep track of the TV schedule of a favorite but unpopular TV show, and I've written articles about favorite but unpopular books. I've also written and edited articles that I use as references for my work.
I never got involved in the "politics" of Wikipedia; I just care about making the content better for personal use. Maybe this is where this guy went wrong. Simply editing articles is not a waste of time, even if you're the only one that reads them. At the very least it helps you.