I remember when doing some privacy cleanup, looking at the third-party list of a website and visiting the sites behind them. I ended up one time on Crazy Egg.
3 months later, I got an email if I wouldn't want to use their services.
They did have my email.
From where? (the answer is obviously from the sites they track)

But I mean, who cares about your email when they have your f****** passport
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https://medium.freecodecamp.org/pri...

This world is getting to crazy, I thought this would be the maximum. Of course...
Next headline:
https://telegraph.co.uk/news/2018/...

I think tracking is a more serious problem, than I imagined (and I do already try to reduce data)

Oh yeah and btw I just noticed an iOS app could silently use my mobile data (was deactivated for the app) to display ads. Silently. I hope this was a bug. But I don't think so.