Just an after thought.
With regards to the dangers of showing un trained people.
The described techniques take practice and practice to perfect.
There are plenty of people who know of the techniques and can use them in a way.
How ever I have rolled/trained with a lot of grapplers.
With most of the grapplers(not all)the techniques could be countered .
Why? because they werent put on correctly.Not perfected.
With this in mind I dont thing someone will get the correct technique just by being shown. There fore its a diffucult question.
I suppose its a balance.