Are you 100% certain that they have not removed your address and that they are behind the mails?
If you are then I would think that the most effective deterrent would be to name & shame
They told me they removed my email address. So I dont know if they have or not, am just sick of the emails.
If they continue then I will name & shame them, and then people can make sure they never give there email address to this person.
I may get banned for nameing, so I shall wait for Mark to come along and tell me, weather I can or not.