yeah it's not like your mouse movements is a serious privacy issue
It's also an efficient way to distinguish people from machines. Think about the click-only reCaptcha for example.
Would you change mouse each time you change browser tabs, keeping a mouse for Facebook and a mouse for other websites?
Also, keep in mind mouse tracking is just another technique deployed to identify you. It's not supposed to be a silver bullet.
I absolutely not believe that. for real. this is something i keep reading but a seriously not see how mouse movement can be unique from one person to another. it's not a fingerprint come on.
> It's also an efficient way to distinguish people from machines.
well that i can believe, but not more