For what is imo a more balanced take, see these comments from a China law expert at YLS:
https://www.chinalawtranslate.com/en/overseas-police-station...
https://www.chinalawtranslate.com/en/overseas-police-station...
From these sources, it seems the issue is less the stations themselves and more the agents in them acting as a reporting apperatus of those critical of China. To me, this is just semantics. These activities are happening, but the "police stations" are not the cause of them.