I asked our data team what the fuck they need this level of tracking for, and they said "wasn't us, it was marketing that requested it".
So I ask many of the marketing people, and they just say "oh we thought it could be useful!" Without actually clarifying the "how" or "why".
I removed that shit with a quickness after that, and no one's complained so far (duh)
I love the GDPR if nothing else because it scares the - excuse the vulgarity and ableism - retarded decision makers into not doing idiotic shit like this. For any kind of bullshit like this I just bring up GDPR as a shield these days and none of it goes through