Why are Somalian pirates allowed to keep doing what they do?

Answer 1

There is now some opposition to what the Somalian pirates are doing, which is probably making some of them think twice about becoming pirates. But the area (West Indian ocean) in which they work is so vast, so large, that it is hard to keep them all under surveillance. And the ships that they attack, at least in the past have been seldom armed for defense. And because they have been fairly successful in the past, and there are so few ways to earn big money in their country, they have a lot of determination to earn it by piracy, which seems the easiest thing for them to do. So they will continue, because many of them still get away with this act of theft, until there are easier ways to patrol, watch, and sink their ships on a regular basis.