Your comment re security hole is not accurate. It in no way is a security concern for them. How can this possibly impact, in terms of their security?
eBay has a responsibility to protect their users and I feel that an open redirector on their servers is a security concern for them. We may have to agree to disagree on that point though as I wasn't trying to drum up dissent here but rather just show some people how ludicrous it is to try and stop SPAM sometimes when you can't even get the support of the companies at the core of the victimization. Truthfully, I though some of the security people here would be able to laugh and commiserate.
Regards, KAM