Things are more likely to be produced and less likely to be deleted. You throw something onto the Internet and Google, and it leaves a trail that just never seems to die. Read an article once, painted a nice image of changing e-mail addresses. He imagined that still, at his old e-mail address, for a long time at least, he would continue to receive e-mail there. It would of course bounce, but by the fact that e-mail would be still sent to it would acknowledge the presence of a ghost. Ghost in the Shell.

So think: exponential hard drive capacity expansion, human hesitation to erase, that stupid dialog box when you delete. Further proof that we're merrily marching along to the Singularity.