Perhaps not - there is no statute of limitations on collecting unpaid child support.
yes, see link
You can get arrested in all US states if you don't follow the court order to pay child support.
As a passport is now required, if you're over $5000 in arrears, a passport is canceled.Actually you don't need a passport to enter Canada only to get back into the U.S. But I don't know if a child support conviction is grounds for inadmissability. Seeing that child support is not a criminal offence in Canada
Yes.
I doubt there were many child support laws back then. Normally, only the custodial parent of the child can file for child support, not the actual child.
yes
Yes, they can. n
Yes.
Can I get a Twic card owing back child support
your State's child support agency
what if your done with current child support but still owe interest for back support.