There is a realy danger to having a votebot that leaves comments. Presumably the point of a votebot is to garner XP for its owner; however, if the votebot creates comments, these comments could be --ed. Thus a vote bot that comments must either be smart enough to say something worthwhile (which I imagine is somewhat difficult) or the owner of said bot would probably lose more XP then she gained.

On the other hand if she were smart enough to write a votebot that leaves comments that get ++ed, she could probably write a bot that would pass the Turing Test, and a node about something that passes the Turing Test would be an XP goldmine...

Matt