The entire purpose of a corporation is to
enhance shareholder value. Anything else is invalid.
It may take awhile, but if people start finding themselves banned from, say, YouTube or Facebook by IP, they'll start caring about NAT.
At the point where NAT is that heavily used... IP addresses will no longer be viable identifications for bans.
"The Avis WIZARD decides if you get to drive a car. Your head won't touch the pillow of a Sheraton unless their computer says it's okay." -- Arthur Miller