Also, a lot of times guys on the juice will literally have their muscle rip off of the bone. In Nomar Garciapara's case, this was true (though there is no proof of actual steroid use in his case, it is pretty obvious that he was or is a user).
What happens is your bones are not capable of supporting the incredible amount of muscle mass that is on top of them, so, the muscle outlives the bone's ability to support it and then breaks away.
A guy in my gym ripped his pecs right off of the bone. The muscle just curled up and came unhinged, so to speak. Needless to say, the guy had to be rushed to the hospital and was in a terrible amount of pain.
Stories like those will keep people away.
"We are reviewing some 9,000 recent UNHCR referrals from Syria. We are receiving roughly a thousand new ones each month, and we expect admissions from Syria to surge in 2015 and beyond." - Anne C. Richard, Assistant Secretary, Bureau of Population, Refugees, and Migration