Final answer:
A server should remain calm and professional when addressing a guest's abusive behavior, seeking to de-escalate the situation and, if necessary, involving management, security, or law enforcement while prioritizing safety.
Step-by-step explanation:
When a guest's behavior becomes abusive or out of control, a server should first attempt to de-escalate the situation using calm and professional communication. If the behavior persists, it's paramount to prioritize the safety of everyone involved - this may involve alerting management or security. The server should never engage in a confrontational manner or retaliate, as this can exacerbate the situation.
Depending on the severity of the guest's actions, it may be necessary to involve law enforcement. Employers should ensure that their staff is trained in handling such situations and provide support as needed.