DS is almost 14. I have to be a bit vague on details but basically he joined a club a few months back. Its a rather unusual sport I think. When DH and I went to watch for the first time a few weeks ago, we were not impressed as it did not seem at all professional or well run. I was also concerned about the lack of safety precautions - I saw one boy doing back flips straight onto the hard floor.
When DS went back for training we were told that last week (DS did not attend due to snow) a boy broke his neck at training. It looks likely he will be paralysed from the neck down and will not be able to breathe unaided 
The coach said the leisure centre have now banned them from using the equipment. When questioned he said it was because he isn't a qualified instructor. I also overheard a conversation which suggested they are not insured.
We have told DS it is unlikely he will be able to return to the club. DS is distraught as he loves the club, his friends go, and he likes the instructor etc.
I have explained to DS that altho the coach knows how to do this stuff, that does not mean he knows how to teach it. even tried 'pretend you haven't been to this club. Now would you like to go to a club where they are not qualified, not insured and a boy broke his neck last week'. But DS is still in a terrible mood about it and blaming me for stopping him going.
How do you get them to see reason on stuff like this? There is not another club anywhere near us to swap to and I have the impression that his friends wil continue to attend. I am just getting the 'you runi everything', 'you just don't want me to have fun', 'its up to me if I go' etc etc.