Here is a quick and easy way to report SMS spam for those using android phones - India Against Spam. The app is great making it just one click to report the offending message (to the provider/TRAI) AND delete the irritant. Visit the page for more details.
See the screenshots below – action IS taken!
All it takes is a few clicks once in a while.
If 10 people can spam 100 inboxes, can't the 100 take the 10 down?