| Actually Desmojen they do. Maybe not all the time but I have been on the pitch when it has happened and serious injury is a regular hazard. I have also had friends killed in car and bicycle accidents but it will not stop me cycling or driving.
The TT is an extreme case but imho that does not mean it should be banned. As long as it is allowed people will choose to test themselves on this course, despite the risk and there will be people like me to admire their skill and bravery. | 
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