If another member is being impolite, harassing, or otherwise inappropriate, you can block them to prevent further messages. Blocking a user will stop them from replying to any of your messages or listings. Likewise, you will not be able to reply to their messages or listings while they are blocked.
Tip: You can unblock a user at any time as long as the conversation still exists. If the conversation is deleted or expires, the block becomes permanent.
You can block a user directly via chat:
Block:
Note: You can also delete the conversation by tapping the garbage can icon. Keep in mind that deleting the conversation makes the block permanent and you will not be able to unblock the user later.
Unblock:
Important: You can only unblock a user if the conversation still exists. Once the conversation is deleted, the block cannot be reversed from the app.