I read the whole post very carefully, because during the 10 years I'm a webmaster I've heard at least two dozen of stories from fellow webmasters who said they got banned for no apparent reason. And what is also very annoying with the way Google handles these bans is the fact that you don't get to know why exactly your site have been banned and that there's no way to get your account back.
I mean with most other services you get told what was wrong and most of the times you can try to fix it, in order to regain access - well unless you did something totally illegal. But let's take click-abuse as an example. I can go to somebodies website and just start to mass click on his banners. I know in 9 out of 10 cases Google is going to detect that it wasn't the webmaster who caused these clicks, but somebody else, but I'm pretty sure in one case they might make a mistake and ban your account forever, even tho you have been a good publisher who did nothing wrong.
While I agree that it's no smart business move to randomly mass ban accounts that reach a certain payout limit, there are factors when it _might_ be useful. Some of these ideas have been posted on Hacker News. Matt Cutts Googles Head of Webspam posted in that thread as well - telling everybody Google did nothing wrong (what a surprise). But like I said there are cases where it can be beneficial for Google to ban accounts.
That being said, I'm pretty sure the whole oogle AdSense Leak post on Pastbin is fake - BUT the reactions show that Google is doing something wrong with customer care when it comes to how the handle their publisher - people who should be of high value to the company, as they're the reason why Google is banking 3-4bn profit each quarter.
They should really re-consider their take on how to handle accounts in questions and rather hire a few more people to work with the publisher in order to be able to give them access to their accounts again.
The second time was maybe one month later just to see what happens, and I received the same response email that I got the first time... word for word.