1) Should the remaining (non-voluntary evacuees) of New Orleans be forced to leave the city?
This would be something that would be very hard to enforce. It would take an incredible amount of manpower and money to pay people to go in and force out those who are reluctant to leave. At the same time, yes, people should be forced to leave. With the water sitting around in New Orleans, we are starting to see some dire health threats
emerge. It is for the public good that people not be exposed to the water, even if the people don't have the common sense to realize it.
2) If they somehow remain behind, do they forfeit any claim to government assistance (health care, supplies, or otherwise) related to Katrina recovery efforts?
I don't believe you should keep supplies or anyting like that way from people who choose to remain behind. The government should be an enligthened provider, even if people choose to be in the dark when it coems to their thinking and overall rationale for acting the way that they do.
3) In a general sense, how much effort should the government spend forcing people to evacuate an area in which there is a known and imminent risk? Are there greater circumstances than others where such a forced evacuation is feasible? If so, what?
The best effort it can muster!. We have an area with corpses out in the streets. We have floodwaters that are 10 times more toxic in terms of sewage viruses like E Coli. You also have 25,000 body bags being prepared.(source)
This isn't a minor incident at all and a forced evacuation is direly needed to help remedy this brewing problem. You can't give up trying to protect the public simply due to a few stubborn individuals whose number one concern on their minds isn't the public's safety.