Is your view that said feeding incites responses or that it increases trolling in general? I feel like both would be untrue. The only time the user in question has ever ceased to abuse the monastery was after some pretty serious concurrent backlash. The possibility of having his inanities, lies, and blundering as an attachment to his professional résumé seems to be the closest thing to a deterrent we have and a well indexed record of it is the best tool there is in that.
Update: missing preposition. :P