Despite the ridicule, I believe such a device would actually increase population and life quality.
Once you have a button to end your life at any moment, the amount of fucks you have to give drops by such magnitudes Watson itself would not be able to comprehend!
After the initial stage of whiny emos (I'm taking a pause to inform you I struggled with autocorrect and its desperate need to put "emus" instead of "emos". The Great Emu War must never repeat!) clogging locations, once selfie shenanigans die out, people will start actually living!
"Cancer? Fuck cancer, I have this nifty thing that'll end cancer (and myself, but I digress) in mere minutes!"
"LIS? Blink three times, Timmy, and you're good to go!"
But how does it INCREASE life quality and length if people are dropping like flies left and right?
"Eh, I could always go tomorrow."
This is a sort of luxurious suicide.
As luxurious as those sleep pod things are, at any rate.
Once this thing becomes normal, people will learn to postpone their bus ride if only to care for some minor random shit they have going on.
And then postpone again, as more minor shit keeps popping up.
With this thing, Timmy, a particularly unfortunate child who has been stricken with LIS can always blink his way into this thing and blink aggressively at a nurse until she pushes the button.
Cancer patients can declare "fuck everything!" and go on a wild trip, doing a massive detour before reaching the station and presenting their ticket.
With the massively dropping amount of fucks to give, people would gladly drone their lives away knowing that one day they can just press a button and die in their sleep. No needles, no dealing with Mexican N cartels, no bullshit.
Of course, as with any grandiose, world flipping thing, there will be politicians who would try to stick their rivals into these things. Certainly, this is troubling. Some things would have to be streamlined to prevent a second Holocaust. The end result, however, would be a great world similar to a MMORPG: once you're sufficiently harassed, you can just log off.
As a bonus, equality laws will rise to a new level as bullying and harassment will have new reprecussions.
On the negative side, I don't see it becoming a thing. Not in the US. It's too convenient.
