Well, I for one actually would like CR with some of the characters they play, but I don't see why I should have to put in effort beyond tagging their posts. If I tag you, that means I want a tag back. I shouldn't have to PM you or find you on plurk to ask if I'm ever going to get a response and ultimately get nothing for it. My character gets tags from other players, and the response to him has been positive, so "be less shitty" or "tag out more" don't seem to apply here. And yet I'm still getting nothing.

Someone upthread described it perfectly: It's like someone is posting to a musebox you weren't invited to, but you can't get it off your friends list.