I'm not the least worried I just hate misinformation. If people want to do stupid things with their phones it's entirely up to them. Just keep in mind the possible consequences.
WTH: even on the Sony web site where it shows the Z3: they take a Z3 underwater and show it taking pictures. They even go as far as to suggest that the "external" camera shutter button is placed there for the sole purpose that the "touch screen" won't work under water: http://youtu.be/qsPMY9CsTc4