This is nothing more than a witch hunt. If you're going to accuse people of taking steroids, etc, at least have some better evidence than some pictures of guys with muscles.
These days, with the whole MLB steroids scandal, anyone that's dominating a sport is considered to be doping.
Babe Ruth in this day and age would be said to be doping. Hank Aaron would be said to be doping. Michael Jordan would be said to be doping, etc.
Lebron is a workaholic. Dude is always in the gym and on the court working on his game. Hell, I know guys that are bigger than Lebron muscle wise and have taken zero PHDs.