Which type of information is NOT advisable for law enforcement to require during a checkpoint?

The answer regarding the type of information that is not advisable for law enforcement to require during a checkpoint is linked to the legal and ethical considerations surrounding the collection of personal information. Requiring personal information about a driver's criminal history could lead to potential violations of privacy rights and may not be relevant to the specific purpose of a checkpoint, which is typically focused on safety or compliance with laws such as sobriety checks or vehicle registration verification.

Checkpoints are usually established to serve a legitimate purpose within reasonable suspicion and probable cause, and while officers can verify a driver's license and registration, delving into a driver’s criminal history goes beyond what is generally deemed appropriate without specific cause. This approach also aligns with best practices aimed at protecting individual rights while maintaining public safety.

Other actions, like requiring documents for checking for forgeries and observing driver behavior, are consistent with the role of law enforcement in maintaining safety and ensuring compliance with traffic laws. However, personal inquiries into a driver's past criminal history could infringe on legal limitations and protocols for data collection during a routine stop.