What activity is restricted in public restrooms?

The restriction on smoking in public restrooms is primarily due to health and safety concerns. Smoking can create a fire hazard in enclosed spaces, especially where flammable materials may be present. Additionally, the act of smoking produces secondhand smoke, which poses health risks to others. Public restrooms are typically designed for personal hygiene and quick visits rather than activities that could compromise the environment's cleanliness and safety.

While other activities like eating, using a cell phone, and drinking alcohol could also be discouraged in certain contexts, smoking is more frequently prohibited due to its direct impact on public health and safety. This makes it a clear and enforceable restriction in most public restroom settings.