@Frank Apisa,
I've "eliminated" two by-laws (one by the interior ministry, the other by the justice ministry) which dealt with data collection and illegal data transfers between 'institutions' of both ministries.
I've worked with an organisation within the justice ministry and was 'hired' by a department of the State Criminal Police Office.
So I do know a bit .... besides that I had to help the military secret service 40 years ago.
Certainly, there are some kinds of "black lists".
And when you ask for your stored data, they don't tell you more than for a very specified reason (e.g., you have to ask ask for data they collected during a demonstration or similar - you can't do it generally).
But since we went through two long periods, where the then governments collected all and everything about their citizens ... we don't want it anymore.