Wall Pirate 

Facebook user who must comment on every wall post, regardless of whether or not the comment actually adds something to the conversation.

I wish Facebook had a way to block wall pirates from commenting at all!

Wall Pirate by da_rockman September 29, 2009

Wall pirate 

Someone who reposts continually on facebook such that it fills your wall or dominates the posts on your wall.

I wish Alyssa would stop reposting all those stories on Facebook most of what's on my wall is from her, she is becoming a wall pirate.

Wall pirate by kudachip February 26, 2017