But if it's in the lease, and they are in violation of those terms they have a right, a responsibility honestly to enforce those terms.I moved into an apartment from california to texas to check the area out before settling. had the exact same issue- it is perfectly legal for them to smoke inside their own rooms despite the air conditioning blowing in smoke. we got lucky and those people moved. to be honest bad as it is, it is hard to tell people to not smoke..especially since it is their own home