NATURAL SELECTION OF HUMANS IS GOOD.
Yeah, that's an example. Which is actually pretty true. If someone is dumb enough to lay down on the train tracks, let em. There's a whole book of those, called "the Darwin awards". Just dumb people killing themselves by doing stupid things..
Yes, to a point. I mean, we shouldn't kill everybody who has an IQ under 80. They have a right for life, liberty, and the pursuit of happiness. Also, it shouldn't be on a specific group, like the Jewish during WWII.
I'm not saying we should kill anyone. We should just...remove the signs that say "do not walk onto this shooting range". If you can't figure that out by yourself, you should not procreate. Killing them would be artificial selection, not natural.