https://www.datainspektionen.se/nyheter/2019/sanktionsavgift...
Translated from swedish: A swedish hight school did a pilot with a class with 22 pupils with facial recognition for taking attendance. The school is fined with 20 000 USD for invading the pupils privacy. All pupils has agreed to participate but that doesn't matter since the pupils is dependent to the school, they cannot agree to something like this.