A good board specific movie would be:

Maroa. It's a Venezuelan movie that details the relationship between an eleven year old girl from the slums of Caracas and her music teacher who is a Spaniard living and working in Venezuela. The movie is available to rent and buy fairly cheaply on Amazon Instant Video. You can also order the DVD from Amazon, although I personally found renting and then buying it instantly worked better for me.

Potential spoilers below:

In the movie, it becomes apparent that both the girl and the man have feelings for each other. Eventually, the girl ends up living with the man in his apartment. She wants to become his live in girlfriend, telling him that: "It'll be perfect; I'll cook, clean, and you can fuck me." Later on, she tries to seduce him, but he reluctantly resists her advances.

Even though he didn't actually have sex with her, the police break into his apartment and arrest him for "corruption and abuse of minors". He loses his teaching job and is immediately deported back to Spain. Seven years later, back in his home country, she sends him a letter letting him know that she will be visiting his city...

End spoilers:

I think this would be a much better look into the psyche of the people who frequent this board.

http://www.imdb.com/title/tt0478702/