Being a slave meant never having the stability of knowing your family would be together as many years as God designed it to be. It meant you could come back from picking cotton in a field to find that your children are gone, your husband's gone, your mother's gone. It meant knowing you are property that could be sold to the highest bidder, of value only to continue to support the plantation economy.
When it comes to how the slaves treat each other: If you've been brutalized all your life - if you have seen your children sold or your mother beaten and raped and you have been tortured yourself - you are not going to be up for your best behaviour. Even in the 21st century, 100 people in the midst of terrible suffering are not going to be their best people.
I can't blame modern technology for my predilection for distraction, not after all the hours I've spent watching lost balloons disappear into the clouds. I did it before the Internet, and I'll do it after the apocalypse, assuming we still have helium and weak-gripped children.