To me, the security breach and the kid falling are kind of two separate issues. They should definitely investigate the security breach to make sure that the airport is safe from terrorists and the like. Having said that, I don't like the idea that people can be held liable for other people's express stupidity simply because they didn't stop them. Like, if you came to my house and climbed out on my roof, fell off, and died, do you really think that your family should be able to sue me because I didn't know you were up there and let you die? I don't. It would be one thing if I had expressly agreed to watch you and be responsible for you and then didn't watch you, but if not, I think the blame should lie on you for doing something dumb that just happened to involve my property.
And there are other ways to make companies improve besides awarding large sums of money. I said some would have to stay but overall it should not be the norm.
ITA with Alissa about the breach of security. IMHO the result of the security breach was not that the kid fell out over Boston; the real result of the security breach was that the kid had access to the plane. That, in & of itself, is not necessarily a dangerous or life-threatening thing. As others said, it would be more life-threatening to the passengers if he'd placed a bomb. Once he was on the tarmac, I don't see how a nearly-full-grown 16-year-old boy could have been picked out from anyone else if he was wearing appropriate clothing and wasn't acting suspicious. There are always tons of people out there doing their various jobs. The fact is that this kid went even further with his own stupidity (or, perhaps, death wish) by attempting to stow away in the wheel well, and that is what resulted in his death, not the initial security breach. So the liability of the airport police should be very very limited IMHO if this case even goes forward. Which it should not.
He was a criminal and maybe the airport should sue the family for the cost of increasing security.