since aidmk from yr tn only approached sc. they felt that it is urgent, so they worked on sunday. it is for the sc to decide, what is more important. stopping all work in a state is never favoured by the sc. earlier shiv sena was also fined for a bandh. so there is nothing like sc going against tn. only tamilians had made the complaint. or u think that mk is tamilian and aidmk is not?
as regards river water problem i do not remember much, so i cannot comment. but i remember that once tamilians had beaten kannadigas living in tn on this issue, when jailalitha was cm. that was definitely wrong.