“Don’t be a follower” is good but incomplete advice. Normally this is said as a negative response to following an evil, corrupt, or bad example. Some people, friends, or relatives may not be good examples of how to live and of what to think.
I once knew a 21-year-old man who had a friend too. He had several friends. His group of friends said: “Let’s go get a drink and have a ‘good time.'” He drank his first alcohol that night. He became drunk and ended up in a bar fight. This man took the fight outside where (with his military training) he ended up killing the man. With one dead, the man’s life will never be the same. Prison. Criminal record. Guilt. All it took was one choice. One moment, following some bad advice from a “friend.” He willingly let someone lead him astray. You don’t want to follow this sad example.