Agreed. Another interesting thing I've seen some creative users do is RT various selected @horse_ebooks tweets in succession to make complete statements or sort

Agreed. Another interesting thing I've seen some creative users do is RT various selected @horse_ebooks tweets in succession to make complete statements or sort-of "@horse_ebooks poems" When you saw one done well, it was pretty clever/funny. I think a lot of people always suspected it was a person(s), but it was still interesting in the sense of wondering and imagining a person emulating a bot emulating a person.