I am not sure if I have experienced foot stomping as you describe it, but I have been to many performances that use foot percussion and been okay with what I've heard. That may seem odd considering that I have problems with loud music. I often wonder if I'm the only one in my generation who didn't blow out her eardrums listening to rock music. At my favorite folk venue, I automatically arrive early so that I can sit in the back row, and if more seats are set up behind me, I move back. At another local folk venue, there are often performers I avoid except when they come to local outdoor festivals where I can sit very far away. I even listened to one group from my car in the parking lot. I sympathize with your pain and imagine you will avoid these performers in the future, but I hope you will continue to support others. Also too much for me is the volume of the music some exercise class instructors play in classes at my local Y, where I am usually one of the older participants! The younger generation had better set aside funds for hearing aids because they won't be able to hear "normal" conversation.