Well, let's say he was put off by the idle banter. 

so what do we do?

It is up to the real techies to rise up and start posting relevant items to the list, like the discussion on scripts, the discussion on a Video on Demand service etc. This will put off the idle talker who will in turn start demanding to be unsubscribed from the resulting geek list. 

so the real techies: Kazi ni Kwenu. Either post tech stuff on the list or a gap will arise that will be filled by them.