That article about the athletic director is really bad. The BSA rules also state that adult volunteers cannot have relationships with the Scouts outside of Scouting where grooming could happen. Additionally, all communications (text messaging, emails, etc) have to follow the no private one-on-one rule.

I don't have any experience with any other youth organizations (as a youth or adult), but I hope they all have or adopt similar rules.

(I am Eagle Scout, and I still like to go camping and help others, and volunteering with my old Scout troop is a great way to do that.)