I used to own an L4 Cub. If I had a
PPL passenger, I'd swing from the front with him/her holding stick back etc. Always chocked it though.
With any other passenger, or if solo, I'd always swing it from the back of the prop with my right hand, left hand holding door frame and able to get to the throttle. Again, always chocked it and tied stick back as well. But double check everything especially throttle settings after blowing out sessions.......!
One thing i would stress is get to know your engine... I knew that my L4 would start with the throttle closed, so no mystery about the throttle settings.
As always, there will always be people who have a better safety culture than others, and there will always be hand swinging incidents. But if you take all precautions, it's as safe as it can be.
And to the guy who always knows best who regularly hand swings his Stampe with his worried looking young (5?) son in the front cockpit, no chocks, stick not tied back etc etc, I hope his first solo flight is
after his 16th Birthday
P.S. for those in countries with a crazy H&S culture, make sure you wear ear defenders (noisy!), a safety helmet (may fall into prop), thick gloves(cut fingers), Safety glasses (particles blown into your eyes), ballistic trousers (cuts to legs) etc etc. See a counsellor after every start in case you may have been affected by prop swinging issues.