Unless something keeps adding energy to the swing, the swing will only get smaller and smaller. If it’s swinging too much? Just stand still, don’t move and let it stabilize.

Guy this just isn’t true. The people on the top are on a gimbal (?) The further they are from the centre of the base the more weight is on their side and the further they will move from the centre of the base.

I’m not trying to be derisive or whatever but checking whether you think something is safe isn’t really good enough. If that’s the company culture then sooner or later some idiot injures themselves unnecessarily because they checked whatever thing and thought it was safe.

Safety regulations and certifications take the decision of whether something is safe out of your hands.