I think bangbros started with one site...bangbus.com the fun was a pair of clowns driving around in a van and luring unsuspecting girls inside. Before you know it the girl is being pounded every way possible in the bus. the whole time the vid is being narrated by the camera man. his voice, the things he said, and his evil laugh just make you laugh out loud...You can't help it...at least I could'nt. Anyway, they finally stop somewhere and dump the chick off, usually pulling away leaving her stranded somewhere while they took off laughing hysterically.
I have no idea how much was real or fake. Now there seems to be a network of sites all under the "bangbros" name. perhaps someone more learned in porn than myself can clarify this mystery further?