Since the Somalians are completely incapable of protecting their own protected waters, commercial fishing boats have been illegally fishing the Somalia's protected waters, overfishing the area and leaving the Somalian fishermen fucked
There are also claims that some EU countries have been using Somalian water to dump nuclear waste and other toxic waste. Since Somalia has long been unable to protect its own waters, I have no doubt that the claims are true.
It's easy to see why fishermen would turn to piracy if the waters are fished dry and poisoned. What else are they going to do? And since the shipping companies have been willing to pay out the relatively small amounts that the pirates demand, there really has been no deterrent to piracy.
Fighting pirates is probably a losing battle over the long term, just like fighting insurgents in the other messes our retarded leaders have led us into. I wouldn't be surprised if the US suffers some heavy casualties trying to chase pirates ashore. They're also going to put crews at greater risk when pirates do take ships - knowing that the US Navy is going to chase them, pirates aren't going to sit around waiting for ransoms anymore. They'll murder the crews and make off with what they can. I read somewhere a while ago that a lot of the piracy that goes on in the indo-china area is of that variety, because the pirates know what would be in store for them if caught by the Chinese.