What are the most interesting things you’ve found in data requests?

Personally, I found very interesting to see entry-exit record requested from the UK Home Office and US CBP, as well as Passenger Name Records generated when booking a trip. If you apply for visa, you can also get internal emails for processing your application, which was very interesting to see too.
From the software perspective, LinkedIn has an interesting way they segment the profile to be targeted by advertisers - including the level of seniority, categorizing as a management or …

application booking cbp data emails entry exit generated home home office internal name office privacy requests things visa