I do agree with Prof. Vamsee Juluri's comments. There are tons of Indians who commited ten fold crimes and are probably commenting how rightly the decision was made in case of Sanjay Dutt. I think Sanjay Dutt's positive impact (through movies) on society should be consider here along with his misdeed. Could he be punished for short term (let say for another year may be) and let him make movies on a social value for rest of his punishement term (atleast three movies and his payment will be donated to a charity).
