Negative examples, if I’m a newcomer, mean that I stop reading the site because the discussion is not consistently high-quality. And newbies looking at negative examples mean that elder posters feel obliged to respond to bad comments, just in case a newbie reads them and gets fooled; it makes it mentally harder to downvote and walk away. This is a change I would strongly consider in any case.
Negative examples, if I’m a newcomer, mean that I stop reading the site because the discussion is not consistently high-quality. And newbies looking at negative examples mean that elder posters feel obliged to respond to bad comments, just in case a newbie reads them and gets fooled; it makes it mentally harder to downvote and walk away. This is a change I would strongly consider in any case.