Ask before photographing people, especially Indigenous communities, market vendors, and anyone in religious or rural settings, because many Mexicans consider it intrusive unless you first greet them and get clear permission. In churches, during processions, and at family events like
quinceañeras or
Day of the Dead altars, flash and close-up shooting may be frowned on or refused, while street scenes and public murals are usually fine if you stay respectful and avoid blocking people.