When attached anywhere on an avatar, the SimpleAvatarProtection component prevents all users, other than the single user listed on the component, from saving the avatar, grabbing materials off of it, or equipping it.
The component is automatically attached to an avatar if "Protect Avatar" is checked when creating it.
All instances of SimpleAvatarProtection on an avatar can be removed by its owner by clicking the "Remove All Instances" button. No other user can remove the component. This is useful if you are trying to clear protection from an avatar, but cannot remember where the component was; you can simply add another instance and remove them all at once.