I have reading lists (chronological) for siege, blackest night, second coming, fall of the hulks, and few more.

Now that these events are over, I do not need to edit the lists any more. I would, on the other hand, like to protect these lists from accidental editing or deletion.

I would thus like to request an option to "lock" a reading list (both custom lists and smart lists), so that it may not be edited any further.

If possible, the "Delete" option may also be grayed out in "locked" lists, preventing them to be deleted until unlocked.

Something like Recycle Bin for deleted list? Maybe, yes. Well, for accidental deletion we have also confirmation dialog preventing this.