Teaching about 'tricky people' instead of 'stranger danger'

I came across this article in my Facebook feed and thought it had a good point and is helpful/realistic.  It talks about teaching your kids how to identify 'tricky people' instead of just telling them not to talk to strangers.  For example, "Tricky adults ask kids for help. If a safe adult needs help, they'll ask another adult."  Not sure how wide spread that idea/lesson is...thoughts?

https://www.kidspot.com.au/parenting/real-life/in-the-news/two-boys-avoid-potential-abduction-because-of-tricky-people-lesson