A restore protection option similar to the termination protection for clusters.
When a cluster has restore protection enabled, it can't be the target cluster for a restore operation. This will prevent accidental restores to the wrong target cluster from affecting the protected cluster.

The motivation is preventing mishaps from affecting critical production clusters.
The UI for selecting the target cluster of a restore operation has you select the cluster from a dropdown and then type in "I Agree". That still leaves you open to mistakenly select the wrong cluster if you aren't paying good enough attention.
The restore protection feature will prevent you from overwriting your protected clusters in this case.