Quoting floridaguy12 Landlord is now arguing that B and I are responsible for all repairs that exceed the amount of J's initial security deposit. Is this true? Yes. It's true. And once you pay it, you may seek reimbursement from those who actually did the damage. Good luck with that. Now you know why roommate arrangements are incredibly bad ideas.
I was 20 years old and in school. Thank you for the advice. But please practice kindness before judging others for their "incredibly bad ideas."