Why do people climb mountains?
To accomplish something. When you venture into extreme/dangerous sports however, you are risking your life, plain and simple. Adults should only be allowed to make such a decision for themselves. A 16 year old is not old enough, nor has enough perspective, experience, or legal right, to make a decision like that. A parent should not make that decision for their child, that's neglectful parenting, which really is not strong enough of a word to describe it. It's vanity because it's all about setting some sort of a record, getting in the news, and getting famous. A trip around the world can be attempted at the age of 16 or at an older age. It's not nearly as news worthy though if a 21 year old does it. That won't get you a trip to The Tonight Show with Jay Leno. If it's about a sense of accomplishment, practice more till you're at least of legal age, have your life figured out, what you want to do with it, and if you still want to make this a life goal, then go for it. 13 year olds climbing mount everest? 16 year olds trying to sail the ocean by themselves through dangerous oceans? That is flat out irresponsible parenting, regardless of the outcome.