I for one love the wild mustangs, however, you have to be practical. Sometimes stuff needs be done to save the system as a whole.
I've seen the Cloud movie, its a good one for sure, but you have to realize that you cannot control the movement of these horses, ranchers are trying to support cattle on the land, and then to have to support all the deer, antelope, and wild horses...well you can understand how they wouldn't be too cool about the idea.
But at any rate - I hope eveything turns out for the best either way.
BTW - they (BLM) adopt them out all the time - if you want one its not that hard to get one.