Remember, the picture from the PNS isn't going to be edited, people are going to say you shot it. If it doesn't turn out that well, e.g. relative set the PNS to iso 1600 for some strange reasons, just remember that the image will be circulated around along with your name tag to it.
Also, you have this issue with copyright. Remember, copyright of the image belongs to the person who click the shutter. What happens if they guy decides to sell the image to the press for $$? For all you know, they could be members from the same company or the person requesting it might be standing next to someone who's a big shot. Few weeks later you see the picture you shot using the PNS being published as an ad in a newspaper or magazine, where you could have just billed the guy for usage and loading.
Just somethings for everyone to think about.