"Community members have addressed concerns of this sort for many years, but sometimes volunteers who intervene in such cases may themselves face retaliation for their actions..."<p>This is why I stopped contributing.<p>There is a particular person whom I encountered who'd been using Wikipedia for several years to praise himself and defame others. This includes Wikipedia editors, journalists, politicians, and academic institutions.<p>If he took a particular interest in you or your organization, he would create websites defaming you. He would do this while trying to clean up reports about his behavior across the Web and in the media.<p>I spent a couple of years tracking his behavior across the Web, archiving things, and developing of profile of him and his behavior. I finally decided to call it quits because I was concerned that I'd end up as a direct target.<p>I also stopped editing Wikipedia to ensure that our paths would not cross again.<p>This is definitely not Wikimedia's fault. He's developed an increasingly sophisticated approach to avoiding detection like using rented residential IPs, mobile devices from other countries, numerous sock accounts, and more. In the end, it simply wasn't worth it to me.