One of the things driving my high level of caution is LiveJournal's experience, it being our code parent and all. The antispam system we inherited is basically the same as theirs from ~2007, around about the time they were experiencing epic levels of spam that only got worse. They wound up getting blacklisted by a major antispam service because they were not able to address all of the spam they were getting.

But we are not actually at a spam level where I'm concerned about that when I think about this for more than 30 seconds.