In practice this means that over time, the storage space occupied by warez and porn files increases to fill any void present on the writable storage medium they are contained on. During research it was shown that no matter how large the researcher's hard drives grew, warez and porn always expanded to fill any space available.
Some of the longer-term researchers also reported that the growth rate of warez and porn seemed to closely follow Moore's law. Further research is required to determine if this is the cause or an effect of Parkinson's law's applicability to warez and porn. It is even possible that the inverse is true - that warez and porn are in fact the cause for Moore's law in the first place.
I know - warez and porn expand so as to fill the storage space available.
Yeah, that's why they call it the lame reference to Parkinson's law for warez and porn.