I might watch a few youtube videos regarding this and will see their reaction but just thinking of the tournament itself. I find it inappropriate at some point and thinking that some of these contestants might injure their head or their neck because of this. Either way, I don't blame them if they really want to join.
Because you mentioned the risk of injury ... I don't think that the risk of getting injured is different from, for example, boxing or so-called cage fights. The players know what they are getting into and are happy to accept the risk.