What happens when you block someone on messenger?

When you block messages from someone: They'll no longer be able to contact you (ex: send you messages, call you) in Messenger or in Facebook chat. ... If you choose to enter a group conversation with the person you blocked, you'll able to see their messages and they'll be able to see yours in that conversation. read more

When you block messages from someone: They'll no longer be able to contact you (example: send you messages, call you) in Messenger or in Facebook chat. You'll also no longer be able to contact them in Messenger or in Facebook chat. read more

When you block someone: They'll no longer be able to contact you (ex: send you messages, call you) in Messenger or in Facebook chat. You'll also no longer be able to contact them in Messenger or in Facebook chat. If you and the person you block are in a group conversation together, you'll be notified before you enter the conversation. read more

If you block someone on Facebook or messenger, you both will not be able to each others activities and also not be able to send messages. Old conversation will be still in inbox but name of that person will not be clickable. read more