I guess this more a privacy question - but would be a personal security
question, if a better group to ask, please inform me, thanks.

The internet is now so transparent that if you do anything from home,
everyone knows it. Back in the days, one could sign up for a service,
even from home, and no one knew it was you, by using various telephony
techniques. That has been dead for awhile.

But it seems to me that the net is getting free again - where you can buy a
prepaid Visa Card at the check-out lane and hop on a computer with a Wi-Fi
connection outside a Laundromat even, and no one knows who you are. Am I
wrong?

thanks