Comment by jeroenhd
Should be noted that Denmark is not the only country that weasels its way around bans on mass surveillance like that.
Take Belgium, which took the "mass surveillance by default is illegal" and introduced a law that forced mass surveillance in areas that exceeded a certain legal threshold, designed specifically to include every single town in Belgium except for some tiny town where almost nobody lives.
Other European countries have applied similar workarounds. They're all pretty much dead the moment they hit the courts, but as long as the public doesn't know and nobody bothers to start a lawsuit, the mass surveillance continues.
"Data retention", as the industry calls it, is still active far and wide across Europe. Some countries retain said data for days at most, others for years.