Simple. We don't need to use our guns. God has given us an extra power to make things organized. This power is very known called as COMMON SENSE.
Even my 4 year old son could solve the problem by just asking him, "Is Scarborough Shoal is far from the Philippine archipelago, so China would have all the rights to claim it?" He would probably use his common sense by just looking the island's distance from China and Philippines.
The most populated county in the whole world is China. It is also one of the powerful countries in terms of military forces. By using the common sense, Philippines is a mismatch.
The President of the Philippines Noynoy Aquino was using his common sense by giving warning to country neighbours about China's aggressiveness on territorial claims. He said China's claims are getting closer and closer to the shore so neighboring countries must be vigilant on their islands too especially those islands that are located around the South China Sea.
Philippines, with the help of the United States as ally of the country would surely join hand in hand in protecting the their territories but of course WAR is not a thing that people would be proud of.
World War III. Cross finger.
The Global Times, on of the biggest China running newspaper published an editorial regarding the Scarborough thingy, and to quote it says " China does not want war, but definitely has no fear of it".
It seems that this huge country is willing to lock and load their advanced war toys to any possible attacks while the Philippine government is in red alert and is thinking of ways to negotiate it in a professional and democratic way.
The war has actually started. China hackers attacked the University of the Philippines website imposing that Scarborough is theirs. But Philippine hackers took a vengeance and hacked China's website telling the same claims.
Again, common sense is the powerful tool that God implanted in the core of our consciousness. If we will not use it, WAR would be the next move.