Which of the following would likely be illegal regarding police filming?

Creating a physical barrier between police and citizens can be construed as illegal because it may impede law enforcement activities and violate local laws regarding obstruction of justice or interference with police operations. When individuals create barriers, it can affect the police's ability to perform their duties safely and effectively, which is often prohibited by regulations designed to ensure public safety and order during police actions, such as arrests or crowd control.

In contrast, the other options represent actions that are typically legal, provided they fall within specific guidelines. For instance, filming from a well-lit area is generally acceptable as it does not obstruct policing; using a drone offers a different perspective but can be legal if local regulations governing drone usage are followed; and staying a modest distance away while filming respects the space police need to operate without interference. Understanding these boundaries helps reinforce lawful observation of police activity while ensuring compliance with legal standards and public safety.