In my eyes, it's a person's right to do whatever the hell they want with their own body. Living solely for the sake of not hurting others is pretty much condemning yourself to a mental prison.
Listen, I don't think you should jump off a roof because your parents didn't get you the phone you wanted for your birthday. I don't think people should give up at the first slight hitch in the road. If you're unhappy you should fight to solve that problem, be it getting a find a person to talk to, taking martial arts training or submitting yourself to a clinic. However, if after substantial amounts of time and effort have been put in, a person has not been able to recover the will to live nor will in the foreseeable future, at the end of the day it's their decision what to do with their life and body and especially as family you should be able to respect that.
So Boerd said
Instead, they should make it look like an accident. That way, nobody has to wonder if they drove the individual to do it
If a person is depressed and gets hit by a car, you're leaving the family with an unanswered question. They'll always wonder whether it was an accident or they threw their selves in front of the car. Closure, in many cases, comes with understanding. I agree you shouldn't write an "Screw this world I hate you all!" letter, but at least be honest about your decision and treat your loved ones like rational adults.
Turtlicious said
*tips fedora*m'lady.
You know, you were actually one of the last people I expected to get that one.