What DOES work to a certain extent, however, is locking out known spammers / open proxies, at least flagging comments from known sources of garbage as "To Be Moderated". Brad has launched MT-DSBL which blocks hundreds of spam on my site weekly (only one known false positive so far, a user accessing the site from an ADSL connection with dynamic IP allocation - being hurt by a previous user having that IP banned in DSBL).
I imagine a future release of MT Blacklist allowing auto/testing / auto-submission to the Blitzed list, and then duplicating the MT-DSBL plugin's option for auto-moderating/auto-blocking any comment coming in through a known open proxy.
Yes, some spammers spoof IPs, some spammers spam garbage (no discernible URLs to filter), etc. I have hunch, however, that together bloggers could help the blitzed list to grow rather comprehensive, quickly, and hence kill the problem that is open proxies for spamming.
Anders Jacobsen |