Unfortunately this failed here as at most of those troll incidents: Some people just don't comprehend that it is solely their replies / attention to the troll, which keep the troll going.
These people are an essential part of each trolling game, and IMO no better than a troll after this fact has been brought to their attention, regardless of their intentions.

This is a sad outcome, as the prerequisites were quite good: Only a single troll and many "social web" experienced, seasoned and smart people.
But one or two people who continue to feed a troll (unfortunately there are even more around here) are sufficient to completely dominate a discussion thread with their replies to the trolling. And as they keep going, the troll keeps going.

The result is always the same: A dead thread (in terms of real content), with piles of useless clutter / chatter.