What is Landlord Harassment?

Legal Definition
Landlord harassment is the willing creation, by a landlord or his agents, of conditions that are uncomfortable for one or more tenants in order to induce willing abandonment of a rental contract. Such a strategy is often sought because it avoids costly legal expenses and potential problems with eviction. This kind of activity is common in regions where rent control laws exist, but which do not allow the direct extension of rent-controlled prices from one tenancy to the subsequent tenancy, thus allowing landlords to set higher prices. Landlord harassment carries specific legal penalties in some jurisdictions, but enforcement can be very difficult or even impossible in many circumstances. However, when a crime is committed in the process and motives similar to those described above are subsequently proven in court, then those motives may be considered an aggravating factor in many jurisdictions, thus subjecting the offender(s) to a stiffer sentence.
-- Wikipedia