It can be very important to recognize a legitimate complaint against someone in social media, versus  sustained harassment. 

Legitimate Complaints

• Focuses on the issue: The critique is about a specific business transaction, a specific action, a factual error, or a public statement.
• Tone and language: Generally objective and professional. While it may express frustration, it avoids personal attacks or slurs.
• Constructive goal: Usually seeks an apology, a refund, a correction, or a change in policy.
• Behavioral pattern: Often a one-off or limited interaction that concludes once the issue is resolved or addressed.
• Try to stay within the law. Don't usually devolve into doxxing or posting messages that have a legal expectation of privacy attached. 

Harassment

• Focuses on the person: Involves name-calling, insults, or attacks on someone's character, appearance, or personal life.
• Tactics used: Includes doxxing (releasing private info), stalking, creating fake accounts to mock the user, or encouraging others to join in (brigading).
• Malicious goal: Intended to silence, shame, or cause emotional/reputational distress to the target.
• Behavioral pattern: Repetitive, unwanted, and sustained over a prolonged period, often ignoring requests to stop.
• Can often get out of hand: People who are uninvolved with the original issues often lend energy and poor behavior to the harassment but are not stopped. 

If the complaints are legal in nature and the complainant doesn't involve the authorities or creates conditions that would interfere with an investigation, it's often a sign that the goal is harassment