He's free now, but there will come a time when someone will die, maybe many. The free world must start putting something into place to make piracy a very high risk venture for the pirates.
Here in Australia we detect refugees and drug smugglers approaching Australia along more than 3000 miles of largely uninhabited coast, surely similar technology could be used to detect the mother ships, and then once identified as carrying armed persons, they could be sunk.
I'm sure that after a few pirate crews disappeared without trace, the pirates would start to get the message.
"I am totally responsible for what I write,... however I cannot be held responsible for your complete inability to understand"