How Do I Block Someone On Messenger
Olivia Luz

Just tap on it to block the person on messenger.
You can block them on messenger as well as on facebook. Click on their profile icon picture or name displayed at the top of the screen to display a list of settings. Now press on block to block the specific person from facebook messenger. Then a popup appears.
For now we will choose the block on messenger option. Open a conversation with the person you want to block and click. Now press on block on messenger. You will see two options on the page.
There are two ways in which you can block someone on facebook messenger. Then scroll down the newly opened page in facebook messenger and press block. Scroll down to the bottom and select block. Open facebook messenger and search for a conversation with the person who you would like to block.
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Tap on block on messenger option. Now again a new page opens showing block on messenger and block on facebook.Source : pinterest.com