Not true unfortunately under the GDPR nor it's predecessor, if the notes are publicly available:
Bodil Lindquist v Åklagarkammaren (2003)
Mrs. Lindquist (whose purposes were mostly charitable and religious) published on a private home page personal data about her colleagues, including telephone numbers and information about a coworker’s injured foot and medical leave. This case raised the question if a private home page accessible to only those who have the address is permitted under one of the exclusions (household activity). The European Court of Justice ruled that it is not.
Bodil Lindquist v Åklagarkammaren (2003) Mrs. Lindquist (whose purposes were mostly charitable and religious) published on a private home page personal data about her colleagues, including telephone numbers and information about a coworker’s injured foot and medical leave. This case raised the question if a private home page accessible to only those who have the address is permitted under one of the exclusions (household activity). The European Court of Justice ruled that it is not.