The Geneva Conventions are quite clear as to who is entitled to be considered a prisoner of war, and people who are not part of a regular army and who attack civilians without a uniform are clearly not prisoners of war. They get none of the protections that soldiers get.
Also, the terorrists should be careful what they ask for: prisoners of war can be held indefinitely until the conflict is over. They do not have to have a trial to be placed in POW camps. In fact, they are not allowed to be put on trial to begin with except for war crimes. They would lose many of the luxuries they enjoy now like education.
This is another attempt to find an excuse to get the hunger strikers into the world headlines, and the world really doesn't care, just as the world ignored the many previous hunger strikes to get the exact same absurd demands.