It wasn't so much drugs as it was booze with Chris. I read an interview with her from back in 1995 from some British newspaper and she said that she used them a bit in the seventies but not to the extent of everyone else. Then, she saw what was happening to everyone and stopped using. She said that's when she started drinking more heavily and it became an issue. I think it was by 1985 that she stopped the drinking.
Yeah, Mick blew $8 million on coke and went bankrupt because of it, only to go bankrupt again after buying bad land. He always was a bad businessman!

He looked really bad back in the eighties, REALLY bad. His eyes were all sunken in and everything.
I think Lindsey did his fare share but, unlike the others, I think he experimented with everything.
