Back when MySpace was the social media place to be I exchanged a few messages with Rebecca Linares and had the chance to ask her about her scene with Max Hardcore. She replied (via someone who could write better English than her) that she hated that scene, and him for putting her through it. Watching it it's clear that she was very uncomfortable with what he did to her as she kept trying to cover herself up and turn away from the camera while he penetrated her. A very difficult scene to watch.
Also, Roxy Jezel, not a girl known for being squeamish, did a Max Hardcore scene. Again (thanks to MySpace) she informed me that it was a horrible and degrading experience.