No system is fail-proof. Any child abuse prevention expert will attest to the same thing. No matter what you do, you are not going to have a system that will be 100 percent effective.
Quotes about fail-proof (2 Quotes)
We've been working on this for years, ... It's not going to be fail-proof. It's going to take some time to get items in order, but the system works well in the states that have it.