I know those areas quite well, except the Chinene location mentioned in the MSN article. If accurate it's a good start. When I used to fly over the Niger Delta and Bakassi areas there were literally hundreds of bunkering barges and illegal oil tapping operations, clearly visible.
There was a suspicion that the level of collusion between the "Big Oga" politicians, rich men and military hierarchy meant impunity was the norm. Barges would be openly towed offshore to waiting tankers in broad daylight.
NEO