As far as In understand it (not very much) you can listen in on the transmitted keys, but the interaction can be statistically(!) measured and suspicious bits can me omitted (the wiki is quite comprehensible: https://en.wikipedia.org/wiki/Quantum_key_distribution?wprov...).
There are different protocols, some more and some less quantum and most rely on classical, encrypted channels and trusted nodes in addition to the quantum channels.
One thing is for sure: you can’t send information faster than light with this or any other kind of quantum communication as two entangled qubits are basically two RNGs that are correlated. You’d just get noise without an additional classical, not FTL, data link (please, somebody with expertise: help!)
As already said: Vorführeffekt is neutral and could mean both: success and failure. But the opposite of „a performance with an opposite than expected outcome“ is something that comes out exactly as it’s supposed to be without intervention, right? ;)
I think you would make great strides in thinking about this if you differentiated between feelings and emotions, one being pretty primitive, bodily inner states and the other outward directed, complex scripts that’s are deeply social, learned and performed and shared ways to communicate feelings (take all the different ways for example “anger”, “mourning” or “lust” are performed with totally different modes of articulation and performance between cultures, times and locations. That is: mourning is not a feeling, it’s a complex, socially learned (socialized) script that is performed in a socially expected way, that is rooted in feelings but solved a communicative, social task.
(I know nothing about this topic expect for one book about the socialization of emotions that I read a million years ago).
One thing is for sure: you can’t send information faster than light with this or any other kind of quantum communication as two entangled qubits are basically two RNGs that are correlated. You’d just get noise without an additional classical, not FTL, data link (please, somebody with expertise: help!)