I think two relatively simple rules will eliminate a lot of the chaff and spam without impacting the 'sensible off-topicness':
1) you need to be Hero or Legendary member to post in WO
2) posts in WO do not add to a posters Activity Count
(... bla bla bla elite supremacist bullshit)
NO!
I'm a full member participating in WO since I was a Newbie and it's been the thread I've most participated, asked and responded in this whole forum.
Turn it in a closed elite club is throwing away A LOT of people who can aggregate. Just to be clear, the guy who's compiling the list and helping most is bitserve, another Full Member just like me.