My recently relaunched website has been featured in Wikipedia as a 'resource' on a very relevant page. I have no idea who did this but I was obviously thrilled at first that somebody felt my website was relevant enough to appear there.
This seems to have caused no end of problems on Google, however. Because my website's brand name is also a popular keyword in its niche (it is an EMD, but a short one) that is the keyword that this indivudual used on Wikipedia. My problem is that there are dozens if not hundreds of websites that scrape Wikipedia and now my keyword appears as anchor text on those websites.
It seems that Google has penalised me for this because from their point of view they see dozens of links with the same anchor text. Because my website is relatively young this makes up a large proportion of the link profile and I don't think this looks natural.
I explained this to Google in a reconsideration request and they revoked a manual penalty as a result. A few hours prior to that I received one of those 'unnatural link' warnings without the yellow caution signs. Now two weeks later my rankings have not improved at all for this keyword (which is also my website name) whereas previously it was ranking quite well for this.