Little is ever said about the thousands of rogue tenants that trash rental houses or steal rents.   
One rogue tenant can spoil it for everybody in a block of flats, yet the law is always on the side of these types and instead holds the landlord to account.
Then when the landlord acts, they get no help whatsoever from the authorities.

For every rogue tenant there are thousands of rogue tenants.
The tenant referencing services confirms that.