the case described had nothing to do with the victims account on any specific platform, it was people misusing his picture for lulz. If banned on instagram they could have continued anywhere else.
especially if you reach out to slang, you will find words like Bescheissen, Verarschen, and so on. But still, mutual trust is indeed an important thing to the Germans, and what's more important, it applies to society in general, not just your peers or connections.
the answer is, as always, decentralization. The link between creator, consumer, and optionally, the sponsor aka advertiser, should not be in the hands of a single monopolist.
emojis are not something strictly defined. They vary across messaging platforms and clients, or versions of clients. Sometimes it means that the person sending them sees a different image then the recepient, which also can lead do different interpretation
people don't register on facebook to check out this cool new social network, it's bee quite while since FB was cool. But imagine a situation of great social pressure, like your kindergarten parent group is communicating there