Danny Bonaduce is a child star who went through the typical child star slide into the gutter.  He was homeless by 20, addicted to something or other, and a raging alcoholic.  He eventually climbed out and started doing shitty acting gigs before becoming a radio host.  He had a reality tv show for a while and it was actually great because his life was such a wreck.  He was taking roids, drinking crazy ammounts of booze, and I'm pretty sure he tried to kill himself.  He's now a co-host on Adam Carola's radio show - which is fucking hillarious.  
Adam Carola sucks so bad. He's one of the un-funniest people that I have ever listened to. Seriously, someone needs to tell him to just shut up. 
Also, I read what you posted about the guy, and I kind of felt bad for him. I still do, but after watching that video...wow. What a douche bag. He deserved that. I laughed.