This kind of action will only generate more hatred for Hindu Indians in Australia by the Australian white community (most of the attackers are from this comm.).
In fact, think of the reaction the Australian public will have when watching this story on the news, that the Royal Australian Air Force website was hacked, they will not be happy and will be angry at the Indian community. In fact, this may even unite the moderate Australians with the Anti-Indian Australians.
I understand the Indian student's frustration but hacking the RAAF's website is considerably counter-productive, and in fact gives many Australians a reason to believe Indians are a national security (including internet/cyberspace) threat.
Some think it's "awesome", I think it's counter productive because it will likely generate more hatred and attacks against Indian students and community.