"2. Entertained by how HN thinks ad targeting works (we don't want to know everything about YOU. we want to know basic info about all of our users.)"

I'm sorry but this sounds so naive to me. As you say in your last paragraph Facebook was tracking a ton of info about everyone. This is why a lot of people distrust Facebook. You might find this entertaining but this happens when you spy on people. We can't know what Facebook does with the data.

There are also people who targeted a friend as prank and succeeded. So it is possible to target very specific people. With enough money you can do a lot of evil with this (Cambride Analytica).

Because we don't know how they use the data a lot of people now actively block requests to Facebook when they visit a website.

I don't think this is very entertaining.