PSA: When your personal data is published, people are not free to use it

People are often told if their data is published, they have no expectation of privacy. But I found an interesting gem in the EDPB Guidelines of 04/2019 which counters that to some degree:

59. Even in the event that personal data is made available publicly with the permission and understanding of a data subject, it does not mean that any other controller with access to the personal data may freely process it themselves for their own purposes – they must have their own legal basis.²⁰

²⁰See Case of Satakunnan Markkinapörssi Oy and Satamedia Oy v. Finland no. 931/13.

IMO, that means #AI bots cannot exploit openly public data if it’s data that’s personal to a European or someone residing in Europe.