A thirteen year-old downloading software off the internet and using it is age appropriate (i.e. it is not reasonable for parents of teenagers to check everything they are doing online), the parents would consequently not be civilly liable in Germany.
(This is my personal extrapolation of the respective German laws. The case I know about is the following: Two twelve year-olds walk home unaccompanied from a nearby playground and decide on their way home to slash the tires of a neighbor’s car with a small swiss army knife one of the kids received as a present. The parents aren’t civilly liable in this case because it is age appropriate for twelve year-olds to walk to a nearby playground and back alone and it is also appropriate for one of the kids to own a small swiss army knife. There is nothing reasonable the parents could have done to directly prevent the incident.)
teenagers who most likely are not liable to the same extent as adults
would it have satisfied your pedantry, or would you still argue to the contrary?
But let's wait for the court session (if there will be any), shall we?
I think they achieved this.