My ISP (Internet service provider) is BSNL, I have issued my Portal ID and my password (which I was using to view my Internet usage) in an "Social Networking Websites" almost any one who have viewed that page, will know my Portal ID and password. I did't knew the importance of these things at that time, I have removed it now. Lucily no one has changed my password. Can they misuse those information if yes how?( Apart from changing my password)