What cultural faux pas should I try to avoid making in San Francisco?

"It is important to be mindful of cultural differences when visiting San Francisco. It is important to be respectful of the city's diverse population and to avoid making assumptions about people based on their race, ethnicity, gender, sexual orientation, or religion. Additionally, it is important to be aware of the city's history and to avoid making insensitive comments about the city's past. It is also important to be aware of the city's public transportation system and to avoid blocking the sidewalks or bike lanes. Finally, it is important to be mindful of the city's noise ordinances and to avoid making loud noises late at night," said another expat in San Francisco, the United States.