An NICU, as the name suggests, is an intense place. If I was a nurse in one and someone fired off a flash, that person would need to go to a proctologist to remove the camera.
The room(s) are filled with babies, many hanging onto life by a thread. Alarms are constantly going off warning of babies who have stopped breathing (the monitors measure blood oxygen levels) and the babes need to be gently shaken to get them to start breathing again...not to mention a host of other complications that can come along with being a premie.
The room is also filled worried, stressed parents -- who might be the ones who shove the camera up where the sun never shines instead of a nurse. Id rather take a flash photo of a newborn griz and deal with a momma bear than a human mother who thinks her child has be endangered by some fool with a flash. Even after 14 years, I still get emotional remembering the experience of have three boys weighing about 2.5 pounds in there (and boys have a worse survival rate than girls, everything else being equal).
So Diopositivo, if you do get in this situation, lube up before using a flash -- it will make camera removal easier...
Vaughn