Restraining order may be needed

Due to the escalating hostility and threatining beahvior of Arizona Mike, I am seriously considering getting a restraining order against him. He recently threatened me in an e mail to a mutual friend and is now engaging in slander on this website. In light of his threats to the webmaster Rick as well, I believe his mental state is deteriorating to a point of being a danger to others. I cant figure just what is the cause of the rage he exhibits on this website but I find it disturbing. Its best that he stays away from my wife and I when in the area.