Reply #212: What is the privacy policy at Free Republic?

[Doremus]

Many boards don't allow the posting of private information, including email addresses.

May be worth an email to them.

Edited to add:
No way-no how would I want my email addy on the Freeper site.
If they won't delete it at your request (and they ought to, and ban the AH too), then I'd block the sender and any others that come in. If it's a throwaway addy, you might think about doing just that.