In general, these rules have been known for a very long time, boiled down it is "don't be a dick and don't allow others to use your property to be a dick" in law. Of course, for Americans who are used to acting like dicks with impunity towards each other and everyone else, this being coded in law is anathema.
"Politicians send SWAT teams to the homes of people, famously in the case of Andy Grote, where someone replied "you're such a dick" to one of Grote's tweets. Grote reported this to the police, the attorney general figured out who the poster was, and sent a SWAT team (6 police officers!) to confiscate all their electronic devices. This is not an isolated case; this happens frequently."
Nah mate, Germans are famously thin skinned and have built an authoritarian state to protect their feelings.