Catfishing online is a popular blackhat tactic for predators who pretend to be someone else. People use celebrities' pics as their profile pictures in order to avoid sharing their own pictures online. This is really a good idea to protect yourself on social media.
The main goal of catfishing is to obtain financial gains from other people. By keeping your profile picture on their profile, they can act like you and can communicate anything with your friends and colleagues.
If they are involved in a financial scam, you will be getting into trouble without knowing what is going on. This is a big privacy issue for people who use social media. For celebrities, this may not be an issue because they allow their photos to be copied online.
However, for common people, this is not the case. Stealing your identity online should be reported and before that, you must be aware of this.
Since we collaborate with our friends on social media, we need to be careful about sharing our pictures. It is important to safeguard your privacy.