Identify a behavioral indicator that may warrant a security screening.

Excessive nervousness or avoidance of security personnel can serve as a significant behavioral indicator that may warrant additional security screening. This reaction often raises suspicions because individuals who are nervous may be attempting to conceal something or may not be prepared for the scrutiny of a security check. In a security context, people exhibiting such behavior might be viewed as potentially engaging in unlawful or inappropriate activities, such as smuggling or carrying contraband, which makes them a focus for further evaluation.

A calm demeanor, for instance, generally suggests confidence and an openness to the screening process, thus typically not raising red flags. Similarly, having multiple tickets may be common for travelers and does not inherently suggest suspicious behavior. Loud interactions with others might indicate a heightened state of emotion or excitement but does not directly correlate with security concerns as strongly as nervousness or avoidance does.