I pin my husband's text conversation to the top of the list. Unfortunately, I've accidentally deleted that conversation (or others that aren't pinned) more than once. I would love for the app to have the capability to lock either a conversation or specific messages so that can't be deleted accidentally. Unfortunately, I've selected multiple conversations without noticing and then quickly double clicked the trash can and deleted ones I didn't want to delete. Maybe the deletion process takes more than one step? Or you have to put in a code to unlock a conversation or message that you have previously locked? I think this would be a great add to the app. Thanks!