I know that Google's failings with this algo have been discussed ad nauseum, but I just found another result that made me laugh.
I was searching for a retail store that advertises on my site. The second result was the retail store's website. The third result was the retail store's ad on my site.
The first result was a post from a niche forum I've never heard of. The title is "Avoid (name of retail store)". The description is, "These f*****g people are crazy. Last week I ordered a...", then it continues.
I don't know how the "f-bomb" got past Google, or how a forum post (especially one with the "f-bomb") ranks #1, but it's funny.