A few months after moving in with my roommates, one of the three began smoking pot. Within a few months time span the remaining two began smoking as well. It has turned into a nightly occurrence with their friends staying over for weeks on end, and now it has escalated to other illicit drugs being consumed on the property. We are renting a house and I am stuck on the lease for 4 more months. I do not want to suffer the cost of breaking my lease nor do I want any legal trouble. What can I do to protect myself?