With the katrina thing, I think most rational people would understand why those nurses did what they did. And even if they don't, they could still understand the logic that led to the decisions that were made.
In any case, that was an extreme situation that a vast majority of nurses would ever be put in to.
As for a nurse murdering their husband...who doesn't murder their husband nowadays?
Seriously though, there are way more stories of Christians going nuts and killing off their children, but I don't go assuming that everyone at church is out to off their kids.
As for the nurse who stole the identities...yeah this is a huge risk considering how many people have access to sensitive information. Given the numbers, I am surpised this doesn't hit the news more often.
And yeah, heard a few stories about nurses killing off patients in various situations. So this probably holds the most weight.
However, to give ya the short answer after all of this...no, I don't think it will have an affect on the general public. But yes, with some people this will hurt the reputation. With that having been said, those same people constantly look over their shoulders for black helicopters and keep locks on their fridges so I'm not too concerned.