As shown in this message, the people that are currently causing problems here are likely to keep causing problems for a while. That specific person is also causing problems on other wikis at the moment.
I have been giving Valenthyne the chance to proceed with adopting the wiki since he seemed most interested in doing so but he hasn't done it yet. You are one of three people who have been the most active here recently, so I am leaving this same message for all three of you. I would like for you to spend the next week making at least a couple edits per day so that if he hasn't acted on this by next Saturday, we have at least one more person ready to go that could adopt the wiki.
I will also make edits during the week in case no one else is ready. I'd rather not be the one that puts in the adoption request because all four of you have more edits here than I do and it would mean that I'd have to hold off with adopting a different wiki that needs my help. But if no one else will, I will so that the problems can begin getting cleaned up.
This is why I have been encouraging you to go forward with adopting this wiki. If you were an administrator, you'd be able to delete the pages he and his cohorts are creating and set blocks on them.
This particular person is combining vandalism with trolling/attention-seeking behavior. They want you to respond and get upset at what they are doing so it can make them feel good. Messages like what you wrote above are exactly what they are looking for. The best way to handle things like this is not to respond, or if you do, do it in an impartial and manner-of-fact manner. The less you react to what they are doing, the less fun it is for them. I suggest you read my Reacting to Trolls and Vandalism blog that was featured on Community Central for tips on how to handle these kinds of situations.
Since it's become apparent that they are going to continue to cause problems here, I am going to get a couple more people involved in editing here during the week so that if you have not submitted the adoption request by next weekend, we have others ready to do so.