One of the most common methods of cybercrime is doxing https://chekkee.com/what-is-doxxing-how-to-protect-yourself-from-getting-doxxed/ . The motives of the perpetrators can be quite different - denunciation of the victim, intimidation, revenge, and so on.
There are a few tips to help a user not get caught in the hook of a doxer:
Don't talk about yourself online. Don't post or share your personal information, such as your geographic location or cell phone number.
Set up privacy in messengers and on social networks - close your profile and keep an eye on your list of friends;
Secure your own accounts. In addition to coming up with a complex password, use two-factor authentication.