For a past couple of month this user named http://www.openstreetmap.org/user/Jem%20Scott is changing stuff for no apparent reason. He is even naming street to his name randomly. Is there a way to stop this guy?
Spot on. For info, there’s a bit more information over that the Foundation wiki’s Data Working Group page - http://wiki.osmfoundation.org/wiki/Data_Working_Group has a “I’ve seen a problem; what should I do?” section.