Well, it did happen, and funny part that "slaves" was a "child" cmdrs, who was like less than 12 years old IRL... that fact is quite self-explain why it happen at first place.
They got lured into FC, and taken into system where they could not jump away, forced to mine stuff for some time(few days), yet neither of those kid cmdrs realized at time, they could simply use escape pods, and avoid whole drama..
Thats why I think elite aint is game for kids (that much young), but that just my personal opinion... So my dear cmdrs, if any of you got kids(that much young) who's into elite, watch them out, what they are doing. Simple as that.
Either way, I cant see, or image how upcoming squadron system, would cause any form of "slavery" or "exploitation" of new cmdrs who aint got any clue what they are doing. Neither any of it is my concern about upcoming squadron revamp... my only concern is whenever engineered is shared, and consequences it would bring into PVP.