I wonder what the second order effects of this on the HN karma system will be. It'll create a graph of karmic supernodes perhaps. Say I green-blob someone with a big reputation here, say jacquesm; no doubt lots of other people will do the same. The friends-of-friends icon is going to appear widely but it'll all be a single edge away from Jacques' node. Is that much of a signal? I dunno. That's 30 seconds of thought about it. It's a fun idea though so I'll try it.

Version two: hide foes? Come to think of it, maybe the 'foe' aspect is the fun part...

EDIT: it's like I summoned him.