If you would like to prevent a user from communicating with you, you may add their profile to your “blocked” list.
Desktop version:
- Go to the user's page;
- Click/tap “More” above the chat window;
- Select “Block User”;
- Click/tap “Block” to confirm.
Mobile version:
- Go to the user's page;
- Scroll down the page to find "More" button;
- Select “Block user” from the drop-down menu;
- Press “Block”.