In reply to girlymonkey:
> I worry that people don't want to be a hassle, so "I will say that I want to die rather than keep burdening others with my care" could be someone's thought process.
Being somewhat provocative:
Let's suppose that someone really does want to die, rather than burdening their relatives (or others), and is sufficiently clear in that wish that they maintain it and state it in private conversations with at least two different doctors over a period of some months (or whatever safeguards are specified), in that case why shouldn't they have their wish?
To me the problem case is if the relatives would be happy for them to end it, but they themselves wish to go on. In such cases one presumes and hopes that the private conversations with doctors would be sufficient safeguard. But genuinely wanting to end things owing to not wishing to be a burden on others could be considered rather noble. So long as it is genuinely their choice, I don't have a problem with them deciding on those grounds.