Why does Melinda feel comfortable roaming the hospital in Speak?

Melinda feels comfortable roaming the hospital in "Speak" because she finds a sense of anonymity and freedom in being surrounded by strangers who do not know her past or judge her. The hospital environment provides her with a temporary escape from the pressures of her everyday life and allows her to temporarily dissociate from her traumatic experiences. Additionally, the hospital setting represents a place of healing and safety for Melinda, giving her a sense of peace and calmness.