Sign me up... I got offered a job by one of the PMCs in Afghanistan, didn't take it because I didn't want to get killed by a nameless, faceless enemy, but here, I'd jump on that. "Garr we be hijacking yer ship!" "I don't think so... BOOM!"
Also, saw a thing that a lot of shipping companies are installing LRAD (Long Range Acoustic Devices) on their ships, emitting over 750+dB.
http://en.wikipedia.org/wiki/LRAD