Ganesh Utsav is not traditional festival of Maharashtra,India. Ganesh Utsav was started by Lokmanya Tilak Ji as British government had banned gathering of Freedom fighter. Tilak Ji started Ganesh Utsav to held meeting with people involved in Freedom movement of India. People in Maharshtra continued celebration of Ganesh Utsav. At that time Ganesh Utsav was totally environment friendly.People were having faith on विघ्नहर्ता !
We have completed 63years of Independence now Ganesh Utsav has totally changed the meaning. There are people who celebrate Ganesh Utsav towards their devotion for Lord Ganesha but there are many people who are celebrating the festival for their own enjoyment. Many people use Ganesh Utsav to collect donation and enjoy that money in the name of lord Ganesh. In the night you'll get many people playing cards and drinking whisky across all Ganesh Pandalas in mumbai.
Political parties show their power with Ganesh Utsav. They used to fund most of the Pandals across Mumbai. It's like branding exercise for them. You can see the Banners of politicians across Mumbai during the Ganpati festival. Every political party is involved in this branding exercise.
I am very sorry for the people who celebrate Ganesh Utsav with faith and trust in people but that class in getting sink. I have observed that Two group of people are fighting to decide their Territory to collect donation. Ganesh Utsav now became festival for noise pollution than worship of God.