Correct me if I'm wrong, but as I understand it, if you have a "firstname.lastname@example.org" link on your site, spambots pick up on that and spam away. That's why you see some people do "yourname (at) yourservice (dot) com" and not provide clickable links. Some people just even do email forms. Again, I could be wrong about this.
Also, I do not know how to get your address off such lists.