Pretty sure every CRM has input for positive and negative comments.

Abuse an employee of a company? Of course they will note it down.

Have you been forgiving during a massive service failure? They will note that down.

I believe the term is 'Difficult Guest' in the hotel industry. Sometimes it means you complain a lot, but I have also seen it marked where it means a hotel needs to pay extra attention to you because of a previous mistake they have made, e.g. when a GM invites you to return and look after you because of a poor previous experience.