That's another absurd point about our public debates: No one cares to share some facts. It feels like it's all based on gut feeling and emotions.

As far as I know, we don't have official numbers (at least not shared as part of the discussion). But what we know is, those scanners have a significantly high error rate and will overwhelm law enforcement with false-positives. What we also know is that law enforcement is simply not competent enough, there was a case in Germany where they just removed links in a Forum forgetting to sweep the according link targets to file hosters.