Can anyone here tell me why on earth are we responding to...

Can anyone here tell me why on earth are we responding to trolls? Every time you do this they win. They are setting you up to take the bait and some do every time. Can you imagine a thread whereby no one responded and totally ignored it. Lack of oxygen would soon see it wither and die. But no.....we respond and on and on and on it goes. The result is a thread totally void of any meaningful discussion. Just what the troll wants. So go ahead and keep the troll alive by responding. You are playing into its hands IMO.