It seems that if you hide an answer that has comments, running the delete script in Admin>Stats doesn't delete it because the comments are not hidden (they never show because the answer is hidden).
Could this be improved perhaps, so that it will first delete all comments that are part of a hidden answer? Or, when you hide an answer it hides all its comments automatically to avoid this problem?
Also, slightly related: does reindexing all data remove junk words from the database? In other words, if someone posted "blablablablabla" then that 15-letter 'word' gets indexed. But if I've hidden and deleted the post, will reindexing start completely from scratch? There seems to be a lot of junk in the words table.