Relationship demarketing - The wrong customers are wrong

It is often said that the customer is always right, but most businesses know this to be a trite saying. Only the right customers are always right, and that is because these customers fit the company and the company wants to keep them. The right customers are satisfied. They derive value from what the company does and are aligned with the firm's processes and communications. They provide referrals and positive word-of-mouth. They make money for the company. They are the company's future.
On the other hand, customers who are not profitable now and who probably never will be, and who are perpetually and demonstrably unhappy, are the company's past. They are anchors to improvements in future performance.