Well poaching is poaching, right? Seems like most feel you can poach a coyote, I personally don’t but I don’t know of any state that would charge you where you don’t need a license. Trespassing and shooting a weapon in a prohibited area to me is where he broke the law.
In the end I wasn’t there and only know what was in the article. Personally I could careless about this greentree guy and am not a fan of the Instagram celebrities but I sure wouldn’t put someone for killing a coyote illegally in the same category as someone that kills an elk, bighorn, bear etc illegally.
You're in luck. In WY coyotes are a nongame species. No license, open 24/7/365, pretty much any method of take is legal. The vast majority of Yellowstone is in located within the state of WY. Shoot a coyote across the park line and post it on social media with a clearly visible landmark in the background. I bet a $100 you make the national news.