No it's not.
> You’re by that logic locked on the internet, the supermarket and tattood by your credit score.
You in fact are, but those things aren't as severe as a tattoo on your face declaring your widely-recognized status as someone's property.
The point is that social status and the conspiracy of the rest of society to enforce that can be just as confining if not more so than a literal lock. A prisoner that escapes from prison isn't free, so long as he's within reach of the society that put him there, and a prisoner who understands that may not bother to escape at all.
> You in fact are, but those things aren't as severe as a tattoo on your face declaring your widely-recognized status as someone's property.
How often did this happen and what evidence is there to support it’s widespread usage?
I suggest you do some research and find out to your satisfaction. For a comment thread, I've already provided a reasonable amount.
> You see evidence for the sleep quarters and assume they’re locked in, what evidence do you have to claim that? Where is the evidence of slave abuse you feel is true?
People can be locked in by things other than a physical lock one the door. Didn't some slaves in classical times receive tattoos like "I belong to so and so, return me to him for a reward."?
Edit: here's a citation: https://archive.archaeology.org/9903/abstracts/tattoo.html
> A legal inscription from Ephesus indicates that during the early Roman Empire all slaves exported to Asia were tattooed with the words "tax paid." "Stop me, I'm a runaway" was another standard motto etched on the brows of Roman slaves. New research indicates that Roman authorities punished early Christians with forehead tattoos that condemned them to the mines. In A.D. 330, the first Christian emperor, Constantine, banned the practice of tattooing the faces of convicts, gladiators, and soldiers. Because the human face reflected "the image of divine beauty," he said, "it should not be defiled."