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It should be obvious that that it is not the case of one troll ping-ponging himself. I use Australian IP adresses, and have a particular style of writing. The ""other one"" has a Bulgarian IP address and writes quite differently. But look at it logically.  If it is two trolls ping-ponging, its a troll thread, best thing now is delete the whole thread.  If it is two trolls ping ponging, then, its a troll thread, and definitely the best thing is to delete the whole thread.
So it matters not - the best thing is to delete the whole thread - though it is probably too late now.  The troll that started it with his fake appology has got his kicks now, and the other potential trolls out there have had plenty of time to discover it and be inspired to try their own variation.
I suppose, thinking logically from your point of view, there is a third possibility.  It could be a ping-ponging troll that wants it deleted for some weird troll purpose, or two trolls, one of which wants it deleted for some weird troll purpose.  But what could that purpose be?  Trolls feed on exposure, not by invisibility.  If other trolls don't see the thread, or see it promptly removed, they loose their inspiration.
So, please, delete the damm thread.  Can't do any harm.  Either way makes no difference to me personally.
Wickwack (the real one)121.221.83.24  "