Hello!
The German-language Wikipedia is more and more facing the same problems as the English one. We seldom used to have more than one troll at a time, but times they are changing, and we are a bit concerned about the future. At the moment we have to deal with a very persistent troll and another user who has been banned and keeps coming back. In addition to that we have a few long enduring edit-wars. I think we have to create new policies and develop processes to handle theses problems.
The English Wikipedia has much more experience in these things, good and bad, and we would very much like to profit from that. It would be very helpful if some of you could write a few paragraphs about your experience with trolls, how you handle them, how you enforce a user ban, and what your experience with the mediation and arbitration committees is. We could adopt mechanisms that work and avoid mistakes you might have already made.
I think the best thing would be to put you reports on meta, but I can't make up a good name for the page at the moment. Of course you don't have to write in German, most of us have no problem reading English, but writing is a different matter. Thanks for your effort!
Kurt
P.S.: Any advice is welcome, but personally I'd be especially interested in the opinion of Cunc and Ray about these issues.