I simply would ignore this as an open system developer. On the contrary, this mass surveillance is certainly not d'accord with the spirit of most constitutions.

I simply would ignore this as an open system developer. On the contrary, this mass surveillance is certainly not d'accord with the spirit of most constitutions. And that is even more relevant outside of common law countries. The same argument was used for saving connection meta information. The argument was that it is needed to fight terrorism. Now it is used against weed smokers in the vast majority of cases and the statistics are openly available. Covid tracking data was used for criminal investigation. This is a political and management problem as police has quotas to be fulfilled. So they have to find crime to justify their existence. Of course this would also demand that messengers would log connection information. This is a security risk and should not be done with very few exception like financial transactions.