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The person you replied to literally posted an example of it being misused:

> The ability for a website to see when you click on things outside of the page itself (either by changing active window or tab) is quite unexpected from an end-user perspective, and its use in various "ed tech" websites to detect alleged cheating

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Changing tab doesn't tell you where or what someone clicked on outside of the page itself though, only that the page is no longer visible.

I don't see how that's misuse.

If the "ed tech" site was detecting what you're doing 24/7, that would be a problem.

But for the 2 - 5 hour period of time that you're taking an exam and have their web page open, is it unreasonable?

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