One thing that had not occurred to me previously is that browsers send your current timezone. So even tho I'm using a VPN that puts my IP address somewhere else, my clock is gonna give away that I'm in Sydney.
sinceyouarrived.world/taken
sinceyouarrived.world
taken.
A web page that tells you what your browser gave away the moment you arrived. No login, no form, no permission. Most pages do this. None of them tell you.