The largest growth element I see is deaggregation of 'classical' space which may have perfectly valid purpose within an AS, or in a provider-customer relationship, but not N hops away in the DFZ. The reasons vary from putting the burden of traffic engineering on the rest of the world to handwaving about applying security band-aids by reducing the visibility into the the target space.
Joe, If I was visiting your home and I happened to toss a rock through your livingroom window on my way out, would you send me a bill for the repairs? We have no existing business relationship, no contracts in place, so would you send me a bill? Sometimes there are technical solutions to problems but if my actions increase your costs there is also a non-technical solution. One could argue that this whole "CIDR reports" issue should not even be discussed on this list because it is a non-technical issue. If someone else is causing your network increased costs, send them a bill, talk to your lawyer, whatever. But keep it off NANOG. --Michael Dillon (with only half of my tongue in cheek)