I like the idea. I can see there might be problems, but there should be a very strong disclaimer in the points transfer section making it clear that once you've given them away,t ehy're gone.

Perhaps only to one named mod, and have the "points administered by X" displayed on the screen?

Regardless, I think it'd be good. Plus I'd personally feel less guilty about receiving points from a comm I was active in than from an individual person I don't know.