(a) No housing provider shall take any retaliatory action against any tenant who exercises any right conferred upon the tenant by this chapter, by any rule or order issued pursuant to this chapter, or by any other provision of law. Retaliatory action may include any action or proceeding not otherwise permitted by law which seeks to recover possession of a rental unit, action which would unlawfully increase rent, decrease services, increase the obligation of a tenant, or constitute undue or unavoidable inconvenience, violate the privacy of the tenant, harass, reduce the quality or quantity of service, any refusal to honor a lease or rental agreement or any provision of a lease or rental agreement, refusal to renew a lease or rental agreement, termination of a tenancy without cause, or any other form of threat or coercion.