Yes, dangerous elements should be learned with instructor but it doesn't mean people can't discuss it in social media. And the word "encouragement" here can be speculative too.

Besides everything is discussed here, I don't like the line "Shares methods or encouragement for [..] dangerous stunts". It sounds like sportsmen can't share info about performing dangerous elements. For example: can mx bikers share guides how to jump bikes? It's a dangerous stunt technically