Ranger, an unused substitute in Saturday's 2-1 home defeat by Reading, used his Twitter account to tell fans who are not prepared to back the club to stay away.
"If you are loyal fans. Be with us," he wrote. "Be the 12th man. Don't come and boo. That ain't going to help any1. We are a team u boo 1 player... Ur booing all of us!!!"
His remarks prompted an angry response from Thomas Askew of fanzine, The Mag, who told the Daily Express: "The parasite cannot even turn up for training on time despite earning thousands of pounds of our money each week. He denounced fans for showing what they thought of the debacle at St James' Park."