impacting other lives with your death is not responsible and something I would relate to mental problems. Also leaving yourself to be found by friends, family or splattering yourself in a public place, or risking that a jogger finds you, are reckless and ignorant acts. it has nothing to do with exercising your rights over your live/death, when that impact others, does it?
There is also the question of how your suicide affects your environment. Who will you leave behind and how are they going to take it. Will you simply disappear hiking, or fishing, and no body will ever be discovered? Or will they find you in a hotel and there is a good-bye note. Will you need a note if everyone knows how you intend to go one day or will you keep it a secret until the end. A lot of moral dilemmas in every corner. But unless death comes quickly and unexpectedly in another way there are potentially 20-50 years (depending on age) to come up with a grand plan that uniquely fits to the a persons situation.
Ever? Does that apply to something like seatbelt laws too?