Of course it will, and does. You don't think that this technology will have any effect on such behavior, nor that it will incentivize different, unforeseen behaviors?
As long as people are able to hide behind anonymity and usernames then no, I don’t think Blockchain will have an effect on people’s behaviour.
When people are able to be anonymous they are more likely to say things and act in ways that are unlike the way they would if they were face to face with someone.