LL, it is unproductive to critique others without telling us the "correct" way to do something you claim to know well.
Doing a layback is more a question of style than ethic. Many people can do the move differently without using the power need to call the route a 5.10. As one or more people is able to do it without too much energy, we have to think that those who make it like 5.10 most trained there technique to be more efficient at it. Increasing our knowledge never kill any body.
Chalenging some one to do a route where he can lost is life in doing it to show how good he is....For me it is not climbing. Maybe it is a part of the sport climbing mentality that we have that many people don't like