The only crime here is NOT using men/women on horseback to round them up. Helicopters can frighten/kill foals. Horseman galloping behind don't do that.
I, like those above, care about the Mustangs, BUT, I, like those above, have studied the issue.
1) There are NOT vast pieces of land contiguous and available for any wild herd of horses. Maps of their territories show them to be limited circles or ovals. I keep 3 horses on 4 fenced in acres on my land in Illinois, where, in an average year, 1 acre of grass feeds 1 horse for the growing season.
Out West, used to be referred to as "The Great American Desert," it's more like 60 acres of grass/1 horse.
See the problem?
2) "Evil" ranchers often provide water (during droughts) and hay (during the winter) to these herds to keep them ALIVE
3) They are NOT feral, inasmuch as you cannot domesticate a fox, bc it is feral. PLENTY of trainers looks to "adopt" Mustangs, mostly bc they are CHEAP!! May have gone up, but last time I looked, you paid $140.00
I paid $3K for my Mountain Horse gelding, $2,5K for my Mountain Horse mare,, and $1.5K for my QH (not registered and from a "rescue".)
4) Back to "feral", wild horses are like blank slates. As long as nobody has "mucked up" their training, and you are starting from scratch, they train in very well. Living History US Cavalry Groups, located at Forts which are museums, will brag that ALL of their mounts were Mustangs, and they can be desensitized to everything you desensitize a horse to not be afraid of.
5) Did you know that in bad times, like this country in 2022, people who cannot sell their domestic horses will "set them free" with an existing herd. As long as it is a mare or gelding (neutered stallion,) they will join up and become "wild."
6) Therefore, with this type of interbreeding, you don't know WHAT to expect as far as conformation, and that's important for a riding or driving horse.
7) Clinton Anderson (from Austrailia, now, I think lives in Texas,) has shown evidence that "Brumby's," which are their version of the Mustang, can founder. It is often thought that Mustangs were so physically tough that they could live on practically air and never have a hoof problem. Wrong!
The best medicine is to consider going to a horse rescue. Don't throw away your brains and adopt a lame or sick horse. They cost enough$ without adding nursing bills.