Crazy, no... but the liklihood of success depends alot on how used to walking barefoot you are and what terrain you'll be walking in. When not at work, I spend most of the summer barefoot and really don't have much problems with most areas that I walk, including through nettles, thistles, black/raspberries. As for poison ivy, I've walked through it some but generally just go around it. There are areas where I go REALLY slow such as areas near osage,locust and other plant with bigger thorns. Sandburs, in my book are a no go. I end of having to stop and pick the darn things off the bottom of my feet way too often to make walking, let alone any kind of stalking or sneaking reasonable.
I don't and never have lived where poisonous snakes are an issue so can't really comment there.
Walking barefoot really heightens awareness, both for those things that'll poke your feet and for everthing else around you. If you haven't gone barefoot up 'til now, I'd wait for next season cuz if your feet aren't reasonably tough, it won't be much fun and I think probably too distracting to make stalking effective.
But, in reasonable terrain and with practice, barefeet can't be beat by any type of shoe for quietness, traction, and comfort and for the awareness of your surroundings that it encourages. Good luck with it.
Ted