In the German state of Bavaria, dozens of people are in 'preventive detention' because they might otherwise engage in climate protests, specifically around the car industry exposition IAA in Munich.
Apparently possible for a month there...
https://www.zeit.de/gesellschaft/zeitgeschehen/2023-09/letzte-generation-bayern-praeventivhaft-gewahrsam
To be fair, in this case 16 people are already free since yesterday. The other 9 have been taken into custody while demonstrating. Not because of the demonstrating itself, but for various reasons, ranging from resistance against the police to cases where they technically endangered someones live by blocking emergency vehicles. They will be in jail for another 19 days. Another reason for longer jail sentences are them being impossible to learn, aka. not changing behaviour from previous incidents.
To be fair, in this case 16 people are already free since yesterday. The other 9 have been taken into custody while demonstrating. Not because of the demonstrating itself, but for various reasons, ranging from resistance against the police to cases where they technically endangered someones live by blocking emergency vehicles. They will be in jail for another 19 days. Another reason for longer jail sentences are them being impossible to learn, aka. not changing behaviour from previous incidents.