Users of the Facebook Messenger program can communicate, share files, and more, but you can also ban friends or other users who may be bugging you.
Remember that unlike banning someone on Facebook, barring your friends on Facebook Messenger will prevent them from contacting you on Messenger rather than unfriending them.
How Can I block someone on Facebook messenger quickly
1) Launch the Messenger application on your Android phone.
2) Tap on the name of any buddy to start a chat session.
3) Touch the tiny circle icon with (i).
4) Unless you see the “block” option, tap on it and swipe up to scroll to the bottom.
5) There are two options there: “Block on Facebook” and “Block all messages.”
6) Select “block all messages” if you only want to block your friend on Messenger at this point.
7) However, if you also want to block your buddy on Facebook, click “Block on Facebook.” I’m done now.
If you have followed the above instructions, you will be able to stop any friend from harassing you on Facebook Messenger.
