It's interesting to see that real name policies can actually make trolls behave more aggressively. On the other side of the spectrum, I anecdotally find that they actually prevent me from posting constructive things. I frequently refrain from leaving reviews for restaurants and stores on Google because I don't want them associated with my real name. It's not that I would otherwise be leaving low quality or bitter reviews, I'm just not particularly interested in anybody who knows my name having access to information about where I shop, what I eat, etc (even though I would be happy to share this information anonymously to help other people make informed decisions). I feel similarly about commenting on news articles, blogs, and apps that I use. It wouldn't surprise me if this was a significant factor in how real name policies affect overall comment quality.
