This is extremely concerning. Phillip Cross was easily caught because he was running his mouth on twitter, and was blatantly making one-sided edits from his single account. Imagine if a country like Russia makes an orchestrated effort to achieve similar goals, using an army of fake-wikipedia-profiles. They could easily turn Wikipedia into a platform for disseminating propaganda. In fact, I'd be surprised if they haven't done so already.
https://www.vox.com/2018/2/16/17020974/mueller-indictment-in...