When I was 17, I went to concert with my 14 year old brother and a couple of his friends. We didn't even consider wearing earplugs and certainly had never heard of tinnitus. When we got out we had temporary hearing loss. Fortunately, I was the only one who developed tinnitus. That was 23 years ago and I have a feeling that not much has changed in terms of awareness, especially among youth. Playing those levels of sound should be illegal. It's most certainly child abuse to allow kids to attend these events.