I certainly wish my antispam module understood how spam on webpages actually works (ie, it should be largely account-based rather than post-based, and there should be buttons that say "Let this user post freely forever" and "Delete this user and everything they've posted" -- obviously some allowances should also be made for spam posted from hacked accounts of legitimate users, but this is a hopelessly rare case and can probably be dealt with using traditional administrative means). I'm not aware of a better system for Drupal at this time, but there certainly ought to be one.

I'm really sorry for the inconvenience. I may attempt to add a stopgap that allows me to mark individual users manually as immune to the spam filter, which I believe should be possible fairly simply.