[specialist]

> where your behavior reflected on who invited you

Ages ago, I suggested that slashdot (or successor) adopt a mafia-style system of vouching. So that members police their own.

I invite you to slashdot, so your reputation (karma, whatever) impacts my own. In a way, you become my responsibility. To protect my own rep, I may have to kick you off the system.

If you in turn invite others, they also factor into my rep. Kicking you off would also kick off all your invites. And so on.