The villagers kept using my stuff!

i would put on a bed and when i came back from a cave to sleep, i saw a villager sleeping on my Bed! so i had to break my bed and replace it every time it got night (it got me killed!)
after that , i put on a smoker , then another villager went and used it! the same happened when i put a blast furnace . i don't know what the villagers think about my house!