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I have no issue believing you can measure sea levels at certain places. The question is, how do you mix all those measurements together to determine a global sea level number?

Afaik many things affect local measurements, like storms and tides.

For example, if you measure at three points in the US, and one point in Japan, how are the measurements weighted?

Suppose a storm is blowing in the US, increasing the measurements by 1m. How is it being accounted for?

And how is sea level defined - the average over the year? So more ice has melted than usually? Even then, it seems normal that not the same amount of ice would melt every year?

Is it even solid science to measure sea levels over 2 months? How do you measure "sea level"? It seems normal that ice melts as summer comes around. So there would be fluctuations in sea level? How do they account for all the possible variations to establish a sea level number?

And how does that supposedly work? Why do shareholders go along with it?

And what is stopping people from creating businesses that don't do that?

It sounds much like a conspiracy theory to me. The mysterious world of finance that everybody just know to be evil.

I don't doubt that shady things happen. But there has to be a better explanation than "evil businessmen extract value". And how is it "extracting", when people get actual services in return? If I buy an apple at a supermarket, has the supermarket extracted money from me?

That's obvious bullshit, given that most modern businesses provide actual value to people.

Like an airline: people can hop on planes and go to places, to do business or meet people.

You can't do that with an ATM. ATMs don't fly.

If people pick companies to do filtering for them, it is their choice. GMail is causing some problems. In general, most people opt to have suspicious mail sorted into a Spam folder, not deleted completely.

I've been on HN for 13 years, I just don't care for the voting system.