While I feel sorry for those that thought they won the DV Lottery, I cannot but be a bit shocked by some of the actions taken by individuals upon learning that they had been selected. May I remind you that non of the selectees won a green card. They were picked to continue with the application process. Nowhere in the confirmation letter or in the rules of the lottery does it state that you are guaranteed a GC or even an interview. They've made it clear. And while for many with low case# and perfect records this would have de facto guaranteed a GC, this is all based on SPECULATIONS and would hold no ground in any court of law, esp. against the DOS. Well, technically, this case could be successful in bringing some sort of financial compensation but it would cost tons of money, time and effort on the petitioner's side. There is also very little money to be made in legal fees so it's unlikely that a good attorney would take on the case. So the case is dead on arrival.
Again I don't understand some of the people who though they've won and immediately started burning bridges behind them or taking irrational actions. There are cases of people quitting jobs, getting married so that their bf/gf can get a GC as well, selling property, etc. This is just stupid! Until you get that immigrant visa in your passport, you cannot be sure something won't go wrong. As someone once said, $hit happens.