Is doxxing a scammer illegal?

Is it true that doxxing a scammer, which involves revealing their personal information such as their real name, address, or phone number, is actually illegal? I've heard that it can be seen as a form of harassment or invasion of privacy, but what are the specific legal implications of this action? And what are the potential consequences for someone who decides to doxx a scammer? Is there a more effective and legal way to deal with scammers instead?