How bad was the NFL's drug problem in the 70's and 80's

Mike and Mike raised an interesting point this morning which is with football being such a violent, and team oriented game you expect players to be big and hit hard all the time and you don't get the random eye popping individual stats that you get in baseball from suspected roid users.

That said it's pretty widely accepted that most of the 70's Steelers defense was on the juice, we all know that Lawrence Taylor's life consisted of doing coke off of a stripper on Satuday then hitting QBs on Sunday, and more recently 7 or so of the 2003 Panthers were suspected of roids.