Meaning Of Middle Fingerin Election

What is Significance of Middle finger in election ?

Watch how celebrities and politicians posed in front of camera this election after casting their votes. Guys any idea what it suggests? The fingers say it all see the below pics of some famous stars and netas.

Below is the picture of chief minister of Maharashtra Ashok Chavan with is wife posing in front of camera with fingers up :)

And Bachan family what a proud expression of freedom after casting their vote

John Abraham was not exceptional

Galileo's finger is on display at the Museo di Storia del Scienza in Italy doesn't it display the significance of middle finger?

And guys though bachan's family and john Abraham pose is ok.... i am really confused with ashok chavan chief minister of Maharashtra what he is cryptically saying can anyone decrypt it lol!!!