In Loiacano v. Salemne, defendants stopped paying rent to their landlord. The landlord sued to evict them for non-payment. Defendants responded by requesting a "Marini hearing." In New Jersey, tenants are almost never allowed to withhold rent from their landlords. But, in Marini v. Ireland, the New Jersey Supreme Court recognized an exception to this rule. If a landlord refuses to make repairs that are necessary to keep the property habitable, then the tenant can make the repairs and withhold an amount from their monthly rent that is equal to the costs of the repairs. If a tenant does this and is then sued for non-payment, the court conducts a "Marini hearing" to determine whether the tenant was justified in doing so.
What made Loiacano unique was that defendants were not claiming that the landlord did anything wrong or failed to make any repairs. Instead, they claimed that they withheld "two months' rent on the basis that their downstairs neighbor was manipulating the heat in their apartment." It wasn't even the downstairs neighbor herself who was allegedly doing this. Instead, it was her boyfriend, "identified only as 'Ray.'" Defendants, who had a "contentious relationship" with Ray, alleged that he would "manipulate the heat [in the first-floor apartment] so that there would be no heat in defendants' second floor apartment."