Well ... while trolling is an art-form, there's no denying that a large portion of it could be emulated by simple pattern-matching.

What is seen here, done by the bot, is only trolling (in the net.art sense) by virtue of the groundwork already done by many (legions) human trolls. Once this groundwork has been done, it's band wagon time, foot soldiers, running the joke into the ground. Of course that part can be done by modern AI bots. It could even be done by much simpler bots (see: twat-o-tron). It's also the part where sometimes the early, more skilled trolls check out and start complaining it's all gone to shit and not like it used to be, etc. (IMVHO it's just part of a natural cycle, but I can appreciate that some individuals prefer to join different parts of that cycle)