http://www.finaid.org/otheraid/parentsrefuse.phtml
This is what they are telling our little darlings. ;)
Regarding the NJ case you cited, I would suspect that part of the "law" if there was one that she filed under is that if a parent is claiming the child as a dependant there can be some obligation. The easy way around that would be to forgoe the tax deduction.
Oh my good golly! That was downright frightening to read...gave me shivers. No wonder so many people grow into adulthood thinking people owe them something.