Most users have very unique styles, or mouse cadence. Same with typing cadence, and there are even services[0] which determine if a user is who they claim to be

Most users have very unique styles, or mouse cadence. Same with typing cadence, and there are even services[0] which determine if a user is who they claim to be, based on their unique typing 'DNA'. All a site has to do is embed some JS that measures your mouse-movement style and they can reliably determine if it's 'you' who is on the site, and can more accurately target ADs at you, or even sell your data out the back door for a profit. [0] https://www.typingdna.com/ https://www.typingdna.com/