Mumbai had been having a better culture of respecting females and the safest city compared to any other city in India for Females.
But recent incidents are displaying the trend changing and no wonder in short time our beloved mumbai will be like many other cities, where females will have to reach home before even 6 pm in the evening.
The evil elements were there earlier too, but they were busy in the wilderness of dance bars etc. Now with the closure of Dance bars, these evil minded elements in the society started coming into the Family Areas for hunting
Adding on to what Aspee DESai mentioned below;
Majority of migrants to mumbai when unable to find suitable livelihood, end up in the hands of anti social elements, the underworld drug mafia or ISI agents.