As far as Wikipedia, there have been wars fought (on Wikipedia) over content. NEVER take an entry there as the definitive source on a subject. 99.999% of Wikipedia is opinion – some of it extremely accurate, some highly biased (to the point of uselessness).

Programs? There's one official release of a version. The people maintaining it test contributions before adding them. If you want to add a module to Linux, you're free to do so – as long as you put your name in the source. Then if it turns out to be the worst thing since the Plague, you get all the credit. (Anonymous source is considered about as useful as yesterday's fish wrapping.)