What offense is most appropriate for a suspect engaging in objectively annoying conduct?

Engaging in objectively annoying conduct aligns best with the definition of disorderly conduct. This offense typically encompasses actions that cause public inconvenience, annoyance, or alarm. Disorderly conduct laws exist to maintain public order and ensure that society can function without undue disruption. The emphasis is on the behavior being disruptive or annoying to the public, which fits the scenario described.

The other options do not capture the essence of merely annoying conduct as effectively. Obstruction of justice pertains to actions that impede law enforcement or judicial processes, which does not directly relate to annoying behavior. Harassment suggests a pattern of behavior aimed at causing distress or alarm to a specific individual, rather than general public annoyance. Disturbance of the peace is broader but often focuses on more severe disruptions in public calm than merely annoying conduct. Therefore, the most fitting charge for the described scenario is disorderly conduct.