Thanks to both of you for the comments @lucylin and @sqamemal. On the question of curation, I saw an interesting idea. No vote is confirmed, up or down unless a second curator confirms the first curator’s vote.
On the question of the “good” bots, vs the destructive bots, I think this has to be a mixture of solutions. Maybe curator voting for or against the use of certain bots, and no monetary reward for bot posts.