Ray Allen didn't kill anybody, but he was friends with those who did. Roethlisberger probably raped a girl, though, so yeah.
Lebron's only crime is getting the fuck out of Ohio and leaving a TERRIBLE team. If the cavaliers had been run even half as well as the Spurs, LBJ would have won a championship there. But, the owner was a fucking idiot, and after re-signing with them once, Lebron wisely moved on. He could have done it better, sure, but his main mistake was not leaving cleveland after his rookie contract was up, really. If he had gone to a competently run team first chance he got, he might have more than 2 rings right now.
If leaving in a bad fashion after giving a team 7 years to craft a good supporting unit is the worst thing LBJ does, he'll be a fucking saint by NBA and pro sports standards.