Kenneth, you need to get into the habit of taking demos before you ban. You have been getting a lot of complaints lately and demos would help cover your ass. Even for something as little as cade breaking, which would mean going into spec (you usually are), and catching the person red handed. Then theres no argument.
Going back and forth with a he said she said type deal, fucking sucks because we really don't know who to believe but we have to assume that there is some sort of abuse taking place. If your don't start covering yourself, then you are going to get yourself into more trouble.