While I once hoped 2017 would be the year of privacy, 2024 closes on a troubling note, a likely decrease in privacy standards across the web. I was surprised by the recent Information Commissioner’s Office post, which criticized Google’s decision to introduce device fingerprinting for advertising purposes from February 2025. According to ICO, this change risks undermining user control and transparency in how personal data is collected and used.
You don’t need to.
By using metrics like IP address , age, gender, race, religion, city, workplace, application, website, favourite song, colour and flavour, throw in a few more questions and you can lucratively target specific groups of people.
By COMBINING those metrics you can target extremely small groups of people, groups with precisely ONE member.
No need for a unique GUID at all.