This time Blight was caught by a security manager, who confronted her, Judge Cameron said.
She was "verbally abusive", and when the security guard tried to hand her a trespass notice, Blight knocked it out of their hand.
The security guard bent to pick up the notice, saying the police would be getting involved.
Blight then tried to grab the trespass notice back, scratching the security guard's wrist in the process and drawing blood.
She has pleaded guilty to shoplifting and assault.
Judge Cameron said she had an "extensive history" and gave no "real" indication of remorse.
He sentenced her to four months community detention and six months of supervision. He also ordered her to pay reparation of $63.32.