Here's a little advice from me Make sure you save Backups in different locations, eg on other computers, in cloud storage, on USB Flash Disk, on CD, printed on paper. Do not save a Backup on your computer or SmartPhone where your Bitcoin Wallet is installed because it will not do any good if your computer / SmartPhone is damaged / lost. Make sure Backup is Secure, not accessible to anyone other than you.
Hopefully my answer can help you.
Your solution offer securing wallets from this time to the future if users read your advice, but this won't save wallets that are already lost.