They were brilliant, weren't they? They conjur up being a kid in the 70s to me. The bigger kids climbing really high up and dangling off the struts. They were stupidly dangerous and great fun. I never actually saw anyone get hurt though, but potentially, they were lethal, which is why I suspect they got banned.
Ah childhood... (Drifts off into misty-eyed reverie about how it were so much tougher (but better) 'when I were a lad' and how kids today have got it easy before realising what an old git he sounds like, and anyway, he's a white, middle class southerner...)