Referrer spam half my bandwidth??? [update - nope] [update - false positives addressed]
A few days ago Alwin posted about his referrer spam and a solution he is using to at least cut it down. (Once the referrer spammers move on to v14gr4.somescummyhost.com it'll stop working, but hopefully they don't get that desperate, because hopefully they'll realize the pressures that drove email spammers to do that don't apply to them. But expecting intelligence from spammers has proven a futile endeavor.)
I went ahead and implemented it. To my great suprise, it seems to have cut my website bandwidth usage approximentally in half. Which bothers me; I had thought the spammers would use HEAD requests and not actually download the pages, as that would slow their referrer spamming way down. See parenthetical in paragraph one. I'll have to wait a few more days to be sure, but if so, this takes my bandwidth pressure off.