Bear with me here.
Let's assume, for the purpose of this discussion, many worlds interpretation of quantum mechanics. This interpretation stipulates something like multiple parallel realities that don't interact going forward. It opens door to interesting thought experiments, including quantum immortality.
Combined with subjective antropic principle MWI would allow the following actions:
1) You and 1000 strangers make a "suicide or get rich pact": set up a machine that would randomly pick one of you to become the inheritor of the other 999 participants and simultaneously kill them. Due to MWI you conscious will be limited to the world where you are the winner, and each of the strangers' conscious will be limited to the parallel world where he is the winner. Since nobody's conscious really disappeared, should you have moral objections to such an action?
2) A setup similar to the above one but less bloody, you buy a lottery ticket and setup the quantum suicide machine to kill you unless you win. Again, your conscious will be limited to the world where you won; however, your family members may exist in both happy dad-got-rich world and terrible-dad-is-dead world. Are you morally responsible to the latter instances of your family members' consciousnesses?
Given the answers, perhaps I should clarify something about MWI + antropic principle. The reason for these questions is that MWI in some respects sounds awfully similar to solipsism. The world YOU live in is in some respects taylored for you and nobody else: it's the world where YOU must be able to exist. The difference with solipsism is that the objective existence of other people is not denied.
Imagine now a Matrix style existence where each participant is presented with his own image of the world. The images may interact, but they can also split apart with no further interaction. Quantum suicide is just a split between the worlds of particular people: one is the sole survivor in his world, and the other one - in his own world.