I just kinda want it on the blockchain record. I think NASA and SpaceX are going to work well together. But i personally believe SpaceX will have to break free from NASA's influence/command if it is to thrive on Mars.
Planetary protection is very important. But we're going to need a sensible approach and balance between the colonists needs of survival and our desire to know more about ancient life.
But in the very, very unlikely scenario it's required, NASA shouldn't have the authority block it off from the colonists who are on the brink of dehydration and death.