Agent stat ranking?

Is there anywhere that tracks rankings for agent stats? I think it would be interesting to know who the current "high score holders" are for the stats that are tracked. Who has collected the most XM and how much, who has the oldest guardian (ok, that one might suck because it would make them a target, but it would still be cool to know how long one has lasted...), etc. I have a feeling that tracking this sort of stuff would probably be a ToS violation, but I thought it was a neat idea and wondered if anybody had done it.