I know a guy who married an American woman and as soon as he got his green card he started abusing her, so she got the marriage annuled because he admitted it was only for the green card.
I actually heard of a related story. A lady marries a guy and tricks him into thinking that their relationship was real. After marriage, the lady starts acting in a manner that causes a lot of frustration in their relationship. She files for abuse and gets some sort of an amnesty.
How much investigating needed to be done though? Married on Feb 17 2006, yet the article is dated today and they were only arrested last week?
I have been seeing a lot of PolishForums.com post show up in my Google searches. I'm not sure how long Google stores that information in their system, but it is scary to know that any posting could be stored in another location for a long time.