Regardless, it's the way things are done in at least one country[1]. This only covers "personally identifiable information" though. Especially this paragraph is

Regardless, it's the way things are done in at least one country[1]. This only covers "personally identifiable information" though. Especially this paragraph is noteworthy: >(8) Disagreement with processing pursuant to paragraph 6(c) must be expressed by the data subject in writing. The controller shall be obliged to notify each controller to whom he has transferred the name, surname and address of the data subject of the fact that the data subject has expressed disagreement with the processing. What this means, is that if telemarketers call you, you just say that you require them to erase your data, and notify everyone they gave the data to erase it too. And you never hear from any telemarketers again. (At least in my experience, it says the disagreement has to be in writing, but they probably err on the side of caution.) 1 - https://www.uoou.cz/en/vismo/zobraz_dok.asp?id_ktg=1107 https://www.uoou.cz/en/vismo/zobraz_dok.asp?id_ktg=1107