According to GNYC.org, there is a practical approach, a clinical approach and a Biblical approach to dealing with ungrateful people and other types of "users and abusers." When taking the practical approach, a person is urged to be on guard and make light of public attacks.
The clinical approach emphasizes healing through positive rational thinking, improving self-confidence and reframing situations. Reframing situations in regards to ungrateful people means finding ways to change negative thinking into positive thinking. The Biblical approach emphasizes addressing the issues with people in person according to Matthew 18:15 and bringing others to confront a person if the person refuses to listen, according to GNYC.org.