I ran into a situation years ago with a gentleman. I started having computer problems and I had written on a computer forum asking for advice. This one gentleman started writing and then started acting like a stalker. I told my husband what had happened and he wrote a very short but powerful email to the guy and told him that he was my husband and for the man to stop writing me. I didn't have any more problems. It might be a good idea for your husband to do the same thing.