I rub a balloon on my head, get it all static like. I leave it awhile so I feel better about making the assumption that the charge is evenly distributed throughout the surface. Little did you know that the ballon had a timed release valve prior to charging with static. The balloon discharges, I measure the charge on the balloon to be equal. I thus conclude that the charge density increased.

My second experiment inflates and deflates the balloon periodically, to create a charge density wave.

Now one may be comfortable with this, as the balloon subjects no manner of space to the crushing forces of magnetars or black holes. But it raises the natural extension, what is the limit to charge density, does it pack like a solid at high pressure, what is the behaviour of this mysterious ether? That happens if the charge density becomes subject to a principle of uncertainty? Is there a viscosity, what limits art there to the charge density wave function, what are the limits to its phase and group velocities?