Do you think they have gone too far in Heroes (the TV show)?

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Do you think the producers of the show have gone too far in making it possible to use Claires (the Cheerleader) blood to bring people back to life? From now on we will never be able to be 100% sure that a character they killed off is really dead and i just think by being able to bring anyone back to life using her blood that there is too much of a free reign for the writers to do anything they want and i think that could spoil the show. What do you think, do you agree or dissagree?