The women said their mission was to go bar-hopping on February 14 and send hundreds of pink knickers to Sri Ram Sena, the militant Hindu group that has said pubs are for men, and that women should stay at home and cook for their husbands.
The same Hindu group was blamed for attacking women in a bar in the southern city of Mangalore in January, an incident that sparked a national debate about women's freedoms in India.
Collection centers have sprung up in several cities, with volunteers calling for bright pink old-fashioned knickers as gifts to the Sri Ram Sena as a mark of defiance.
"Girl power! Go girls, go. Show Ram Sena... who's the boss," reads one post on Facebook from Larkins Dsouza.
Apparently other groups and activities have sprung up too, to show Sri Ram Sena just how widespread the opposition is. Much of this has been facilitated by social networking sites on the interweb. How very 2.0.