At first blush, running aground sounds like an inexcusable error on the part of the crew.

According to Washington Post article, the crew did not give good evacuation instructions, didn't lower some of the lifeboats until the ship was listing too much for them to be lowered, and no evacuation drills were held. That is POSITIVELY inexcusable. I'll go with criminally irresponsible. According to CNN the captain is under arrest.

The cruise line had another fatal accident in 2010. I wouldn't cruise with them.