Owning a house for rental income is a lose lose proposition unless you get lucky in a specific area. The rental income is less than 4% and the construction is constantly depreciating with new maintenance required. With 4% returns and 10% interest, with a PAN, is anyone's guess how much the persons income reduce with income tax. There are ways to offset rental income but not giving PAN is a easier approach.
Once people find how much of a money pit Real Estate for investment is, they try to squeeze the last drop from tenant.
The good landlords will be the ones who have paid off their loan decades back, retired and not dependent on rental income. They just want peaceful tenants who keep the house clean ( yes, they don't bachelor's)
Lastly, are the landlords saints in other cities they way people project it. Or landlords do charity outside Bangalore?