A current example is the article on Rupert Sheldrake,[1] which has recently been subjected to vigorous edit-warring, perhaps as part of a publicity campaign by followers of Sheldrake. (I just saw a new book by Sheldrake at a library yesterday, and perhaps that book's publication set the timing for the editing push.) But there are examples like this all over Wikipedia, and, again, I think most casual users of Wikipedia massively underestimate the percentage of articles that are edited mostly in the interest of pushing a point of view for commercial or ideological reasons.
The article kindly submitted here says, "Anyone can edit Wikipedia, but only a carefully vetted few are promoted to admin status on the site." And that is laughable. Describing the current group of Wikipedia as "a carefully vetted few" does violence to the English language. Nothing has ever been careful about the process for checking the background of administrator candidates or choosing which candidates become administrators. There are some very, very, very good administrators on Wikipedia (just as there are many very helpful everyday volunteer editors), but there are other administrators who are power trips to maintain conduct contrary to Wikipedia policies for building a good, free online encyclopedia. The Vice article submitted here does, at least, link to an Atlantic article[2] reporting that Wikipedia's rate of bringing new administrators on board is slowing. At least some of the administrators have been caught taking payoffs for editing articles to publicize the persons making the payoffs, so it will take more than just the current administrators being more alert to fix this problem on Wikipedia.
[1] https://en.wikipedia.org/wiki/Rupert_Sheldrake
[2] http://www.theatlantic.com/technology/archive/2012/07/3-char...