The "Wiki" system that Wikipedia (the largest-scale example) uses allows people with permission (in the case of Wikipedia, everyone has permission) to edit articles as they see fit. It archives older versions of articles as well, so that articles that are screwed with maliciously can be repaired instantly. The idea is that everyone fixes each other's mistakes and can write articles that focus even on the most obscure topics... There are 300,000 entries in Wikipedia for this reason. There is certainly nothing suspicious about Wikipedia, but it's true that people with a bias or prejudice may write Wiki articles as such. That, of course, is why anyone can fix this mistake. You're expected to write professionally.
it suits the liberals, that is all its good for