As a customer, how else can you send your feedback to Boeing (and the airlines) that this level of perceived risk is unacceptable? It's clear there are issues at the company and Boeing is unlikely to respond unless there are financial consequences.
With that said, however, I really dislike Boeing's recent decisions and the safety issues that have come up. I do agree that Boeing needs to face financial consequences, but I don't believe that customers have any power in this situation. Realistically, airlines and governing authorities would have the most impact and if they don't see issues big enough with Boeing to stop ordering planes, there isn't much else to do.
The fact that they refuse to fix the problem after Lion 610, such that Ethiopian 302 faced the same fate, is, at least for me, horrendously wrong.
Had the same discussion yesterday in another thread - https://news.ycombinator.com/item?id=38886355
THEN add on the fact that there's a one in a million chance your plane may open up and accidentally cast you into the abyss and I say, just give me a car, my snacks, my music, my full seat, and the ability to stop and use the washroom when I want and Im good to drive across the country. Flying bites.
That's not YOUR point. The head of this thread (although to be fair, didn't SAY, but implied) he was swapping planes for safety. And that he's still flying, just on a different plane model, seems to reinforce that it was THEIR point.