Student behaviors in any size gathering can lead to community complaints and/or draw the attention of Event Observers and/or Penn Police. Noise complaints are a chief complaint. (Many noise complaints are quickly resolved by turning down music or moving guests indoors, allowing the event to continue as planned.) Students living off campus are part of a neighborhood made up of other classmates, faculty, staff, and West Philadelphia residents unrelated to the university. These neighbors include families with small children and senior citizens. Neighbors are generally accepting of student socialization, but may tire of prolonged noise, loud music, or loitering. Community members make complaints almost every weekend of the year, citing gatherings large and small. Penn Police are obligated to respond to every complaint of a nuisance house, regardless of affiliation. Besides noise and music, student behaviors that lead to community complaints include: Over-crowing either outside or inside the house Safety issues, such as students on the porch or yard appearing to need medical attention, students on the roof, doors/windows being blocked by furniture, etc. Perceived serving of alcohol to underage students