content filtering with help from "Bundesprüfstelle für jugendgefährdende Medien (BPjM)"
The Bundesprüfstelle für jugendgefährdende Medien (BPjM) (Federal Department for Media Harmful to Young Persons) has a non public list for content filtering. Maybe this source can be useful for filtering in "Safe Search" mode.
Edited by Jens Korte