is when people make a 'witty' remark and then don't come back to fight it out. There are a few people who drop their acerbic comments and when challenged, don't bother to respond.
But he doesn't fight jno. He makes his comments and then leaves. When others answer, he is hiding behind the bus shelter. Not to bee seen again on the thread. He then moves to another thread and does it all again.
ah well, this is the internet, not the real world; people come and go and fall asleep or get called away to put the rubbish bins out. Not everyone comes back to the same thread over and over to get into deep arguments.