I've got a couple of the Mountain Hardwear kilts for hiking. I love them and yes there are some mental reservations about what could have easy access to your junk, but it's truly more mental than reality. I've hiked "commando", but typically with underwear (Ex Officio). They really are a functional garment. I like that in colder weather, I can don and doff merino wool long underwear faster and easier to keep from over-heating or when I need to warm up. They dry much faster than pants or shorts if soaked with sweat. They're much easier to remove for deeper river crossings. There is plenty of data to support the value of staying dry and allowing part of your body plenty of air to avoid fungal buildup. I can accept those who dislike the look, but to claim they are somehow more prone to causing injury or welcoming of arthropod attacks really haven't spent much time outdoors. About the only issue I could see is standing directly over a yellow jacket hole and pissing them off (which happened to me before, but I wasn't wearing a kilt). I would concede they aren't for everyone, every location and every season, but they are quite functional in a majority of hiking locations.
Now, with what I think is a great outdoors attire, I wouldn't recommend them for seriously buggy areas or seasons nor bushwhacking through thick briars. But even with that, I wouldn't hike off trail with my typical backpack clothing anyways...that's a vastly different activity. I abhor ticks, but I actually prefer wearing a kilt during tick season as it's easier to check more often (and both my underwear and kilts are treated with Permethrin).
Let's be honest here...the biggest challenge of the modern hiking kilt is one's fear of what others think
If you can get past that, you will start to appreciate their functionality.
ROCK6