o block messages from someone on Facebook:
- Click at the top right of the page
- Open the conversation with the person you'd like to block
- Click in the top right of the chat box
- Click Block Messages > Block Messages
Learn more about what happens when you block messages from someone and how to unblock messages from someone.
Note:
Blocking messages from someone is different from blocking them on
Facebook. If you block messages from someone, but you don't block them
on Facebook, you'll still be able to see their Facebook profile.
Depending on their privacy settings, you may also be able to see things
like their status updates, comments, likes and tags on Facebook. Learn
more about blocking people on Facebook.