Stop arguing Guys ! The point is, Not just people from Bihar are involved in various activities which ultimately makes trains filthy ,rather people from all parts from India are responsible for this filth. For instance , trains in NR are Very filthy , even Shatabdi's are not being spared by the people.It would be better if we accept our responsibility and play our roles in this plot ( shun the habit of blaming others and the Railways ,to some extent) based on cleanliness. !!
Peace !!