War IS a racket for many. There were lots of people who got rich trading black market goods in WW2 - or any war. However, the idea that an allied ship and a German ship came alongside one another in order to swap contraband during the war is utterly and completely ludicrous if you know the first thing about the war that was fought at sea between the allies and the nazis. Believing this cock and bull story your GF spun you and then telling it to other people just shows your ignorance (and yes, I have history degree).
As for all the economic migrants, sorry economic PEOPLE in Calais, many of them are there because the smugglers who brought them to Europe spun them a bunch of lies. That 5-min clip of David Davies in the camp that someone posted up-thread included Davies meeting some Iraqis who were stuck there because apparently no one had told them that they couldn't just breeze on into the UK, as they'd breezed through all the other countries en route. They didn't realise that they'd need a visa or papers of some kind giving them the right to enter the UK.
I've heard in the past of migrants, sorry PEOPLE, reaching Calais and not even knowing they had a 20-mile stretch of sea to cross to get to the UK. We're not generally talking about well-informed people. I doubt they know anything about the UK, most of them, just whatever stupid stories and hearsay they've picked up along the way.