Yes, banning users and IPs is on the roadmap, but I don't yet know exactly in which version it will appear. In the meantime you can do something yourself - see my answer here: http://www.question2answer.org/qa/138/#139
Word censoring is also a possibility, if there is sufficient demand.
Finally, I'm also aware of the need for an 'Unanswered' questions section. Perhaps you could tell me in a comment what you think it should contain, for example: (a) questions with zero answers, (b) questions with no answer which has upvotes, (c) questions which don't yet have a selected answer.