One of my dear friends has decided to put my email address on every site that he can find. As a joke I got around 20 subscription emails this morning from companies I never heard of. Anyone know how to stop someone from doing this and to report it to the police? Can I track down his ISP through how he signed me up to the websites? I'm 99% sure who it is and would love to have the police pay him a visit or even better the FBI.