Right, there are no ethical downsides to putting the elderly in hellish group homes as long as we give them death when they ask for it.
You can buy gun. Why do you have to request anything?
So that you don't risk harm to other people and property in the process?
a tank of helium + mask/bag satisfies that criteria.
A person in these dire circumstances is likely also someone lacking the resources and ability to accomplish any of these "DIY" schemes. People in care homes are there because they have trouble taking care of their basic needs.
Consumer helium is sold with a good amount of oxygen in it now for exactly that reason.
I'm pretty sure that's a myth, at least in most areas. Helium tanks usually contain >99% pure helium. I've never seen one with a significant amount of oxygen.
Someone has to clean up incidents such as that. I've known people who worked for companies who were contracted to clean up homicides and suicides (ServiceMaster). They were kids barely out of high school and the experience was traumatizing for them.
Ethical self-driven euthanasia requires a lot more than just "buy a gun"