Brain-dead victims: suffer or pull the plug?

[ArchangelMadzz]

Teeqoz said:

If they are brain dead, with physical damage to their brain so there's no chance of recovery, then yes, pull the plug.

However if the person is in an indefinite coma, with just a slim chance of recovery, don't. Or at least let family decide.

Euthanasia is another thing though (which I oppose. To an extent at least).

May I ask why? 

As far as I'm concerned it provides a safe and controlled environment for people to commit suicide instead of jumping infront of buses/trains/buildings/bridges and traumatisiing witnesses'.