I don't have anything against pack stock... Just excessive and inappropriate use caused by folks who use stock. Campsites engineered by people with saws and axes for example. Stock camps with great big manure piles, trees girdled by ongoing rope wear, and rusted metal can piles, old grates, even barrels rotting and rusting away are sometimes the price paid.

Without mules a lot of trail work would not get done. However, hiking past a "trail not maintained for stock" sign I am struck by the difference - suddenly one is on a true wilderness trail, not a wide pulverized dirt road....