The Smoke Detector and whoever is currently active on the site manage to catch the spam posts rather quickly, usually they are gone within minutes. And while having a separate queue for bot-flagged spam would be helpful to verify detection accuracy it seems that right now the number of false positives is zero.
Actually, as a mod, I can't enable the Smoke Detector for AD for my account, so if some non-mods would volunteer this would help in handling the spam posts.