Hello, folks:
It shouldn't be too surprising that since there's only 2 or 3 of us here*, this board would be a prime target for spammers and script kiddies. I can't do much against a determined spammer, but I have locked the entire board against those who registered but didn't validate, and I deleted everyone who has zero posts after deleting all spammy topics.
Even though deleting spam is strangely pleasurable, I don't want to run the risk of deleting legit posts, so keep up the reporting.
* That begs the question of whether we should use IM or IRC instead...
Update: In order to further combat the deluge of spam, I've set a time limit on a certain topic property.