I'd argue that we should listen very carefully to what Germany has to say on the matter, historically, they know and have learned from past mistakes.
Also, Facebook has a data center in Finland, which is under EU-jurisdiction. Germany has a lot of say internally in EU, so Facebook could very quickly be subject to such laws - as they should!
Sure, but I am not quite sure how they are structuring this from a legal perspective. Wouldn't be surprised if this were in fact some pseudo-independently operating branches for both tax reasons as well as the protection of their US assets.
Also, Facebook has a data center in Finland, which is under EU-jurisdiction. Germany has a lot of say internally in EU, so Facebook could very quickly be subject to such laws - as they should!