The athletes themselves should decide. When the USA/Jimmy Carter boycotted the games in 1980, 100s of athletes lost their ONLY CHANCE to reach the pinnacle of their sport. Given the incredibly hard work and sacrifices these athletes make to be among the best in the world, I believe the athletes should make the decision for themselves. I know that this would complicate logistics and the athlete's whole support system (including coaches). Yet it is still my opinion.