It's that time again in the Netherlands, the match between PSV and Ajax has been stopped. The reason for this is unclear, but I suspect it has to do with disturbances between supporters who thought it was inappropriate to throw objects on the field. This first incident happened a few weeks ago, and what you get now is that supporters know that the matches are going to be stopped, they see this as the ultimate opportunity to shchop riots. Some people go to the games for the wrong reasons. But how are you supposed to deal with these kinds of abuses?