If the number of comments in a post or subthread exceeds the upvotes, this leads to the flame detector activating. But also some accounts are just banned. Ban

If the number of comments in a post or subthread exceeds the upvotes, this leads to the flame detector activating. But also some accounts are just banned. Banned accounts can still comment, but they start dead and have to be vouched first before showing to anybody who didn't enable showdead in their profile.