they're pretty spot on, and definitely cant recommend you ride it for obvious legal reasons.
I'd say you've still got a chance though if you jam a seat tube down there. the more penetration the better too, how long is the seat tube you're currently using that just covers it? can you get one an extra 100mm or so long? Even if it does still crack, theres little chance itd be a full break because the post will hold it together somewhat. there would be much less pivot forces on the seat tube too i'd be thinking, given the pivot is in front of the BB.
@link1896 what you think papa swarf?