Oh dear god, this is about the most depressing thing I’ve ever seen on Wikipedia. The diffs speak for themselves: [1] [2].
Same user, three minutes apart.

See also WikiProject Countering systemic bias for some glimmer of hope.

I’ve been following the Wiki dramahz going on today (and just spent a fruitless 20 mins trying to explain it to one of my housemates), but managed to completely miss that it’s Wikipedia’s 8th birthday! See the official blog. I can hardly believe it’s 8 years old, and even less that I’ve been there for almost half that time. Happy Wikipedia Day everyone!