Mercilessness used in a sentence

Mercilessness in a sentence as a noun

People that say cons have it easy, they ain’t never been in Menard.”Not an American, but between saying that cons have it easy and the fact of mass incarceration in the first place, it seems that there's a certain mercilessness in American culture.

But as a user from the early days, nothing in the app clued me into this expectation and accordingly I gave 3 stars for "meets expectations", 4 stars when I was offered refreshments and USB connections, 5 stars when I couldn't imagine a better ride...It's only lately and due to the prevailing rumor of Uber's mercilessness that I give 5 stars to meet "don't fire the driver on my account" and less than 5 stars to mean "I demand a refund and the head of the driver.