Yeah, well I didn't expect a different response from the right-winger. I contend you are wrong. And moreover, even if it was right YOU WOULD NOT be able to stop it by having weak encryption. Mass driftnets wouldn't work - most of these people talk in code so you can't just put in a search string and search through all transmissions. And if you do know WHO to target (i.e. you want to tap one phone), then the Indian police do what they do best - they go and pick up the guy.
Also, go to J&K or the NE and find blackberry wielding terrorists. Also find blackberry wielding naxalites please. Sure, some terrorists use mobile phones. Many of them also talk. Want to cut out people's larynxes?