This does not make sense to me, this practice of trying to keep people alive who do not want to be alive. If they want to die they should be allowed to. What kind of life are you really living if the only reason you're living it is because someone close to you guilted you into it?
Overpopulation is already something some people fear. If we stopped preventing suicides it would be less of a threat.
There already exist many humane ways for people to commit suicide.
Why prevent someone from doing what they want?