roomate trouble

So due to unforeseen circumstances my husband and I had to get roomates and it's been two weeks. I'm on the verge of pulling my hair out with these rude ass ppl who have no boundaries! We both rent so it's not like they have more authority over the house then we do. Neither one of them work so all they do is sit home all day and go into our room and did through my things! We try to be nice and respectfully to their ways and the scents they prefer but they don't do the same. The leave the door open while they smoke all day and I come home to smell that cramp! Rant over just pissed!