This is only somewhat related, but I lost a lot of enthusiasm for football after stories about this kind of tech triggered an overdose on wikipedia and news articles. The historical resistance to concussion research in the NFL left me with a sour taste. Repeated minor concussions are likely to cause later dementia, and I don't really feel very good about watching football players (linemen, mostly) destroy their brains in such a way. I don't know how aware of the danger they are, but gah.<p>It's odd, too, because I do enjoy other sporting events that can have long lasting injury problems, and I really like mixed martial arts. I don't know why exactly football makes me feel skeevy these days and the other sports don't, but there it is. It may be that I can fathom living a full and complete life with, say, blown out knees, but can't even comprehend what it's like to experience Alzheimer's.<p>I also worry (with some incidental evidence) that improvements in helmet tech have actually amplified the problem. If my head is "safely" encased in space age materials, I'm much more likely to use it to whack on people. I suspect linemen and "dirty" defensive players would play a totally different game if the risk to their face and head was more obvious.<p>An interesting link: <a href="http://www.nytimes.com/2009/09/30/sports/football/30dementia.html" rel="nofollow">http://www.nytimes.com/2009/09/30/sports/football/30dementia...</a>