I would like to write something from the heart. Please bear with me if this looks uncomfortable.
A real life example:
During the terrorist attacks in Mumbai in 2008, majority of the attackers were carrying simple GSM phones with Sims that were obtained in India by giving fake identity documents etc. Immediately after the attacks started, Indian Security Agencies (Particularly RAW) was able to track down all this numbers and they were recording all the communications going on between the terrorists and their handlers. The handlers were instructing terrorists at different locations like Taj, Oberoi and Chhabad House minute by minute what to do with the help of the Live Coverage going on on all TV Channels. This continued till the entire operation was over and resulted in such a great loss of life and prolonging of the operation for nearly 2 and half days. The intelligence agencies were just recording the conversations which came out later in the media in all its gory details.
Imagine if they would have instructed Indian Mobile Operators to switch off this numbers immediately on the 1st day itself instead of just recording. so much of precious human lives could have been saved. Alas this needs quick thinking and appropriate response which is sadly lacking in India. They had all the technology at their hand. Still did nothing and no out of the box thinking.
Moral: With all the interception at your hand, it requires a solid pro active intelligence, monitoring and situation handling set up to effectively thwart threats to security which is still not operational in India and don't see it happening in the near future irrespective whether Blackberry grants access or not.
Blackberry granting access means a lot to tickle our Patriotic feelings but on the ground it means big ZERO untill we have a very effective intelligence and situation handling apparatus in place which is not there right now and it just seems will not be there for years to come. Why i say so? If india would have valued the life of its citizens (More than 2,00,000 killed in last 20 years in terrorist, insurgency), it would be alive and kicking now. See America's example after 9/11 in revamping entire security structure with Homeland Security and preventing any significant attack after 9/11.
We are not even able to punish the lone terrorist Ajmal Kasab even till now and spending Crores in keeping him safe!
Unless and untill there is a total revamp of Intelligence structure, Effective Laws to deal with Terrorism, Speedy Justice, all this Blackberry interception things are symbolic gestures to keep us all deeply patriotic Indians in good humour. Symbolic only not Real!!
And by the way why this Drama of discussing with Blackberry for such a long time to get access to the messanger system. If the authorities think earnestly that it is vital for India's security interests, then just ask them to grant access and if they are not giving, ban them. But no, this kind of thing will not happen here. Just this Nautanki will go on for some time. And when things will cool down and off the radar of media and general public, nothing substantial will happen.