At what point do you stop supporting your children financially?
No. You should not give up your retirement security to prevent your child from filing bankruptcy. The law doesnt even want you to do that. If your child has funds in a 401k they are generally protected from bankruptcy. The purpose of bankruptcy is to provide someone with a fresh start. What you are contemplating doesnt give your child a fresh startit burdens him or her further. Let your child accept responsibility for their decisions.