[nl]

I do data science in my day job. I understand combining datasets.

Again, why does using Facebook make me less intelligent?

[dublinben]

If you cannot recognize the harmful implications of this mass data collection, then you are either ignorant or hopelessly naive.

[nl]

I'm asking for it to be explained.

I'm not arguing that data collection is never harmful. Driving a car is potentially harmful too and indeed caused more instances of actual harm than data collection does. And yet I drive a car, in full awareness of the potential harm.

I am saying that using Facebook - in full awareness of the data collected - is not an inherently unintelligent thing to do.