I personally think about it this way: does having a separate, different area save them any money? Does it [i]make[/i] them any money? If no, they probably wouldn't spring for a whole section to house prisoners separately. There might be a holding cell somewhere meant to detain lawbreakers until they could be shipped elsewhere though, intended for if the Dome was full staffed and lived in. (Unless I'm missing it) since none of the "troublemakers" in the cast were convicted of violent crimes* it likely doesn't matter much where they stay, and maybe wouldn't have even been brought on in the first place. 

*This is with the assumption that Alyssa was acquitted after the two years incarceration, purely on the thought that even in a capitalistic hellscape a murder charge would not be so lenient - plus they can make money from convicts so there is more incentive for longer sentences if she actually was found guilty. 

Anyway, since the characters sort of know each other (or at least know of each other), I may do something similar to Expendable and give some in character thoughts on the rest of the cast. And if anyone wants to pitch any ways they think Rhiannon might have harassed their character over the last 3 IC years, go ahead lol