Indian Railway Gov. — Unable to board a train even after having a valid reservation ticket

Address:

West Medinipur, West Bengal

It was 26th Dec 2010. I had booked my ticket from online reservation from Garhbeta to Howrah in Rupshi Bangla Express-DN(12284). The train was about 45 min late at Garhbeta Station (now a days which is usual). And the strange thing was that "All the doors was locked from inside including Reserved Compartment(DP-1,2,3) and one AC compartment.Only 2 doors was unlocked i.e driver and guard's door". Then I went to drivers and had talk with them. They introduced me to some RPF. In short I described them what the problem was. They replied that it had been done by 'public' so they can't do anything. Yes I understand the situation they can't do anything but I travel in this train once in a fortnight. So I know how much people depend on that train.
Another reason for the train to be over-crowded was in the very next day there was a political meeting(27th Dec) in some place of Kolkata. Is it acceptable that "a person carrying a reservation ticket and he can't enter the train compartment because some political supporters are traveling with out tickets and with a banner of that party on their chest."? Don't u think that it's a disgusting!