[bdhcuidbebe]

Invite system tends to do wonder for the quality of discussion, tho.

[sbarre]

Only if you actually get enough people in the door..

Plus sometimes invite systems mean you just get the "usual suspects", friends-of-friends, etc...

It definitely has value in keeping out the spammers and trolls though, I agree there.

I suppose it depends on how you want to handle moderation in the long run.