Interesting comments flying around at a book called Courting Trouble. I very much like MK's idea of drafting a letter that all can copy and email to Amazon. I am all for that.
As far as that GROSSLY offensive email sent to Barbara, that needs to be reported. Barbara, if you could copy the email headers and either post them here or send them to me via email I can find the sender's IP address from the headers and use a WHOIS search engine to tell me who the provider is. An abuse email contact is usually provided -- then send the entire hate email to that address including all the headers. They will be able to find out who sent the email and shut him/her down. I would also recommend sending it to email@example.com. Don't know if they'd jump on that or not, but you never know.