Petition to forbid other players from selling stuff in my tavern

Just the title, dude just joined my game, chatted for a bit, seemed adequate. I left on a hunt for hound claws and when i returned all of my items were gone and i had +like 20k gold. I was so sad. cuz i was finishing farming for my imperial quest and i stacked everything in that chest. It would be nice if people coouldnt sell my stuff or if they take it they could not be thrown out. or a lock on a chest. thanks. gonna go back up my save rn cuz this sucks.