Regarding Rock using; I'm certain he uses low doses, but the awesome physique is 50% of who he is and he hasn't gone overboard. He looks like a well built athlete, not some insecure freak.
I think Rock went off to get smaller, but he wasn't getting the roles he wanted. I think he's forced to use in order to earn a paycheck.
Bodybuilding nowadays is just a bunch or homo attention whores piling on stage in front of 75 schmoes seeking approval and satisfying their insecurities.
People like Onetimehard just juice for attention. They walk around the gym in their spaghetti strap tank tops and bicycle short gazing over at everyone they walk past hoping someone pays attention to their roided out physique.