If a person caused damage to another person, he must compensate that person. Teshuva alone won’t help, no matter how me’ahava it might be. If the person is a public nuisance they have an even harder challenge. So, it’s not clear how the public won’t find out.
By the way, MIDDOS must be worked on. TESHUVA applies to an action. So, the premise of Teshuva Me’ahava for a middah doesn’t quite jibe.