indeed very true. i have myself done this trick.
Alternately, take a local Panvel to Wadala, there you take the Andheri local. There is a Panvel to Andheri local at about 6am.
Kurla/Dadar are to crowded if you have bulky luggage & families. Now you can book Ola Cabs online via their app & you will be picked within 10minutes, Far more cheaper & Comfortable Ac than prepaid taxi, not advisable for people with bulky luggage