There are reasons why Hindi will never take root in India. Our neighbouring states speak Dravidian languages, and knowing one language , it is possible to learn other 3 languages with considerable ease.
In other words Keralites and Tamils are "insulated" from Hindi. Bengali, Marathi, Punjabi are spoken in a area, all surrounded by Hindi speaking states. More mix of people happens, and Hindi have evolved into a Lingua Franca like something. It cannot apply in the case of Tamil Nadu.
We are not surrounded by Hindi speaking states, and transfer of people from North to South is less. But learning Hindi is good for national Integration. It isnt a bad thing. But no need to force it on people.
DMK swept to power, on the Hindi-Tamil issues, if any one do not know the reason. If not for DMK, other languages might not have been provided official status (maybe). We are happy with status quo.
And there was no reason for anyone to dig up a old thread.