Safety is a relatively new term to the game of football. A BSB in the day would get you a sticker or two on your helmet, Kudos at the next practice and cheers when watching the film. Those were the days of:
Dick Butkus
Jack Tatum Nicknamed "The Assassin.
Conrad Dobler
Bill Romanowski Oh, yeah.. and he beat up a backup tight end on HIS OWN TEAM so bad he had to retire. He tore the guy's helmet off and punched him in the eye, breaking his eye socket.
Cliff Harris
just to name a few
In high school during the off season, the coaches would pit the linemen against the backs in military football. Anything goes and BSB was the best of the game (no equipment, just gym shorts and tees).
Coaches would grab your facemask and twist your head 180 degrees or slap you on the side of the head hard enough to make your ears ring. Not wishing for the old days but it was a much more physical game then but the players were not nearly as large. With the size and speed of today's players, the hits had to be tuned down.