As a similar old fart, I put forward similar arguments on another mail list and somebody responded with the question 'What's different between e.g. Amazon remembering your recent purchases and a shopkeeper (of old, people nowadays don't often do it) remembering your purchases and buying stuff in on the off-chance you might like it?'
But your shopkeeper can't disseminate the information round the web can he/she? (Or couldn't then.) You know what they're using it for too.
Bev.