Witnessed (and intervened in) a near miss at a climbing wall today. A climber reported to me that another climber was using auto belays and had been clipping to the gear loop at the rear of her harness.
She had climbed a few routes like this apparently and had (luckily) down climbed 😳
When approached she had no idea of her mistake and was a bit shaken when I told her about the extreme danger of her error. I corrected and clipped her to her belay loop before reporting her to the walls staff who then took her aside to re-run through basic safety with her. Scary stuff!