A colleague told me he cancels his payment account every few years and opens a new one for better privacy. He says the IBAN and various other related info should be known to as few people as possible. With each payment, this information is sent to companies (who have invoiced me).
Is it worth such a high effort? Does it provide a privacy benefit?
The question Is it really risky to make your IBAN public? is about security aka not loose money. I am more interested in privacy related stuff like data collections of various private companies (big data mining etc)