Well at least someone is getting some benefit from my ramblings.
But seriously, this is heavy stuff. As a parent, i totally understand where some people are coming from on this matter. The world is harsh, we go to Disney to escape, and having this scene in the ride can make for some uncomfortable situations. I don't begrudge any parent the right to not expose their child to the scene if they do not wish. That is their choice, one that they should have, and should make according to their values. My approach as a parent is to use the scene to teach.
And to respond to other posters, yes, i know that sexual assault is worse than property crime. But both are still bad, and I wouldn't want my child to engage in either behavior in real life. So it is hypocritical to me to say one is ok to portray in a ride or pretend in play, but not the other, if the claim is that seeing the auction scene will negatively influence them. And kids are smart; they'll notice and question the inconsistency too.
And if we shut them down by saying that's just the way it is, or by just removing the scene entirely....well, then we haven't really helped them understand anything, have we? I'd rather have that tough conversation with my kids (at an age-appropriate level of course), and try to impart on them the critical thinking skills to be able to articulate why the behavior (all of it) is wrong, then just sweep it away and hope that they can figure it out on their own.