It is a community meet, hosted by Europe's largest association of hacker. It is not an official gathering of human right leaders, they act on selfish interests. Are they known for their humanitarian efforts, certainly not.
If anything they would break and work against the security measures, malicious or not depends on them. Through the entire meeting, they mocked the laws, quoting from handful cases which you have been able to find and discussing various security measures as they are used now. Bottom line is break the system for freedom of expression! They are just forcing governments hand to enforce more restrictions. The last thing we need is international hacker groups vouching for freedom of expression in India.
Lastly surveillance in India is nothing compared to the surveillance done by NSA or PLA. A few cases may happen here and there, but it will always be a few. The parent comment was unnecessary sensational.