I would think so too, but the article suggests there are skaters who disagree.
Plus, what was that exact form of "hitting"? I think that's the key.
"Hitting" might have a very wide range. From simple attraction to physical enforcement. With tons of actions in between, ranging from perfectly legal and innocent, through simply inappropriate and going all the way to criminal.
The standard would not be criminal conduct.
Indeed, it could be that a 19 year old and a 15 year old engaging in sexual activity is not criminally illegal if a state has a “Romeo and Juliet” exemption to its laws.
The standard is SafeSport guidelines, which I have not reviewed in detail, but if they are like many other organizations (particularly since the posts use the word “grooming”) prohibit grooming between an adult of influence and a minor. And Google, or perhaps even SafeSport, can be your friend as to what that means.
I agree with Mathman; John Coughlin is not the story now. He is beyond the reach of any enforcement agency (and how I wish the posting skater had shown some knowledge of suicide, and mental illness, and its effects, rather than the statements she apparently wrote)
The issue is did USFS know that violations of its standards were occurring (and it might not have had those standards at the time). And what did it do.