Fascinating, I'm a Libertarian so for me, this is the closest thing to a community without a government, because it's decentralized, since there is nobody saying something is "illegal" or "forbidden" people will tend to do almost anything until somebody else tells them it's not "permitted", the community members are the ones that can decide what is to be considered "allowed".
When I first signed up for Steemit, there was a warning about Plagiarism of images and text, something considered to be a big Don't on Steemit, but even outside of Steemit people don't like Plagiarism and in some cases, it's even illegal.
Now talking about self-voting on comments on Steemit, that can be a very grey area, because from the moment that we publish a post a self-upvote is already added automatically, so it's easy for Steemians to think "well already I'm voting on my post, let's vote on my comments also", I'm Not saying it's ok to make a 100 comments like "nice post" and then self-upvote each one of them, but there should be some sort of warning or something before starting to Flag users, that way they can stop doing Sketchy stuff.