Unfortunately for you, you're definitely in the wrong here. The MMWA coaches are extremely experienced in terrain parks and are actually usually the voice of reason, telling kids not to stop on landings, to look uphill before they drop if they're in the middle of the park, etc etc. It's pretty ridiculous that you're hating on hiking rails when the huge majority of this site does it all the time.
Since you admit that you don't know anything about training or competing, I again think it's pretty ridiculous that you think you can call people out. Maybe you should get a fucking clue and stay out of the park if you're that overwhelmed by a few kids hiking.
Yes, Stowe has the best terrain in the east... but guess what we've had a few significant rain storms and there isn't anything off piste that is skiable on the entire mountain, I would think you'd understand that since you're so well versed in skiing, snowboarding, and mountain lifestyle with your worldly travels and Mt. Hood summers. But you're right it makes sense to give someone shit for spending a lot of money on school when you yourself admit to traveling all over the world to ski (wait sorry I mean snowboard)... yup, that makes so much sense.