Piracy is a removed activity in Saints Row 2.
The data files for this activity are included within the released game. This activity involved boarding Cargo Ships to kill guards and steal a laptop, then taking the stolen goods to a drop-off point. On the way to the drop off point, there are ambush points where police in boats and helicopters appear.
As the data files for this activity are incomplete, some of the details of this activity are uncertain, although the map co-ordinates for the Cargo ship locations are present. Some of the data files cross-reference the deleted hijacking activity with the piracy activity, but it is unknown whether Piracy was originally supposed to replace hijacking, or simply be an additional activity.