from my point we can see that nothing is perfect everyone has some fault................if irctc wants to stop fraudlent TDR then he shud ask railway for put TTE in all trains.
and in my case i have another idea...................suppose IRCTC file case against me then i will buy a unreserved ticket for a minimum distance........and i will show it to irctc ...................that i didnt travelled by reserved ticket thats why i file TDR.