Facebook Dick Rider
A Facebook Dick Rider is like the human version of a spam filter. They comment, they chat, they start every conversation and they never let you be quiet.
You posted a photo of your cat. I commented. You replied. I commented again. You replied again. It's a full-blown conversation over a cat.
You confirmed my friend request. Now I have to talk to you like we're besties.
You posted a status. I commented. You replied. I had to comment again. It's like a tennis match.