the problem with that is there is no 1 specific shipping lane and boats are traveling on their own schedules from different origins to different destinations. i dont think that would logistically work out well
i can see the air force bringing in an ac-130 soon to operate out of east africa, possibly some predators/global hawks for real time intel, have the marines bring a counter-terrorism company or 2 on their amphibious assault ship and have the navy provide logistical support, infiltration/exfiltration and call it a day.
that would be a way to give the pirates a pretty bad day...... arrrgghh