I've only ever read about, maybe a dozen? Out of that dozen, at least half either subsequently explained how they had actually been in breach of the TOS, or later in the thread realised how it happened (checking stats on a mates PC etc).
That leaves, say, 6 "unexplained" bannings. Out of the many thousands of AdSense users who are WebmasterWorld members, I think the risk is ultra-low isn't it?
I would place more concern, and higher probability, that you're going to get run over by a bus, than you're going to get unfairly booted out of AdSense.
That said, the data you mention would be handy for statistical analysis. And understanding your own users clicking patterns. I'd also want to know which ones converted, though, which is my #5.