[int_19h]

Property on anything beyond that which you're immediately using or occupying is a monopoly granted by social convention (from which laws are then derived). As Jefferson said,

"It is a moot question whether the origin of any kind of property is derived from nature at all... It is agreed by those who have seriously considered the subject that no individual has, of natural right, a separate property in an acre of land, for instance. By an universal law, indeed, whatever, whether fixed or movable, belongs to all men equally and in common is the property for the moment of him who occupies it; but when he relinquishes the occupation, the property goes with it. Stable ownership is the gift of social law, and is given late in the progress of society."

So in that sense I don't think it's an altogether misleading analogy, although of course the ability to copy without taking makes it very different from tangible property. But both are ultimately social conventions, and both exist supposedly for the common good. If that common good cannot be demonstrated, and even moreso if there's demonstrable harm, the conventions can change.