This season really feels like the Acali Experiment.
If you aren't familiar look it up, but the TLDR is that this anthropologist took 11 strangers on a long boating expedition with the theory that the isolation would drive them to start raping and killing each other. It ended up just being a group bonding between the 11 and the anthropolgist just seething that he was wrong. To the point that he tried to fabricate situtations to piss them off and start going at each other. It then resulted in the 11 subjects, instead, just bullying him and causing him to just sit deflated for the remainder of the expedition.
The audience and to a degree production is the anthropologist. And these fish are so amicable and likeable in person that people either grow to like them too much to mess with them or are bullied out. And even the baddest of the bad freeloaders have some level of humanity in them. People think Frank would fix it, but I feel like he would run into a wall similar to Josie in S1 where he feels too bad about trying to mess with the twins. Bashir and Landon know him so they would most likely just fanboy out. Maybe James Drake would be the most impacted but even then, I feel like he would just realize Frank has a line he can't cross and it would probably be similar (but less pussy) to when Simbal figured out the line in S3.