My take on this is....these guys served in a horrible, bloody war for oil and apparently being high on previous occasions didn't hamper their efforts not to get killed. I'd say they probably got high before going for two reasons.
1. They wanted to get caught and not have to fight in a war they did not believe in.
2. They wanted to get high because they were aware that it might be the last time they were ever able to do so.
Hell, I say we give them a medal and a phattie!
I wonder had any of them had been killed if their families would have been denied benefits?