Notes on specific laws - the Third Law Answered
As the level of civility approaches absolute zero, the uselessness of an exchange of posts approaches infinity.
There are many threads which are started in good humour - seeking information, looking for an intelligent discussion, or passing on a humorous tidbit. Most of them carry on in the same vein, but, occasionally, people get carried away. Discussion becomes argument, argument becomes name-calling. Tempers fray, feelings get hurt, reputations damaged. We've all seen it, or even been there.
Eventually, when a thread begins to descend into the mire, it actually swamps all the original good it might have done.
Such a thread must be walked away from. Wash your hands of a troll before you get dragged too deep. Abandon it to the fate of the the Second Law, before you waste too much precious bandwidth.