wikipedia claims to be 'the free encyclopedia that anyone can edit' but when you venture beyond the realm of 'basic' editing (fixing typos, correcting broken links, removing obvious spam/vandalism), you'll discover that a great many articles are effectively controlled by either a single editor or a clique of editors who regard it as being their own personal fiefdom for them to do with as they please (namely promoting their own specific POV of the subject of the article)