Messy Roommates

I am SO SICK of coming home to a messy apartment. I'm ready to punch people, literally. Why is it that it had to be me that picked up our apartment? I am on doctor's orders to "take it easy" and "stay off my knee". And one roommate was home ALL MORNING. With her stupid boyfriend that never leaves. And probably at least 60% of the mess was theirs. ESPECIALLY after we have had at least 5 conversations about needing to pick up after ourselves. AND after another roommate literally put the dirty nasty dishes on her bed. ON HER BED! How have they still not gotten the message? I don't know. But I'm done. Next time I come home to a messy apartment, none of my roommates are going to like the consequences, I promise. End rant.