It's kind of strange talking about the right to kill oneself. Of course, we mean that each of us is the master of our fate but it just sounds strange to read that someone has a right to kill oneself. If one didn't, what would happen if one ignored the fact that he doesn't have right to do it?
Anyway, I'd say it this way. I have never been there when I thought there's no other way out, maybe for a fraction of time but that may indicate I've never been in situations where people like Tony have been. So I can't really say with certainty how I'd behave in a situation like that but I can say this: The life isn't just a possession, it's, as far as we know, a remarkable gift and since nobody knows for sure what's beyond that, it's really tricky thinking whether it's better to--just not be any more. Are we sure we would be better off if we just weren't alive anymore? This brings in a lot more questions and answers depend solely upon what you believe. I believe I will always be better off by being rather than not being, until of course the time comes for that. A friend of mine, God I don't know how he's now, used to half joke saying he likes to feel pain every morning even though he could barely dress himself and function normally due to his illness, but feeling pain every morning meant that he is still alive.
But as someone already said here, what Tony did prior to disappearing was a clear call for help, even though maybe not so clear to himself. I'm hoping he finds the strength to fight indefinitely now that he can clearly see the support he has from his friends and community. I wish people close to him realize what he needs most right now is support and understanding for his condition, no matter what some people say. No one can tell for sure what he feels. A life is a serious matter, not to be taken lightly. Unfortunately, too many people find out about that too late.