Was wanting to suggest a "AFK" tag, when I run /afk it would add a "AFK" tag in my name in tab menu...As of now it only says it in chat once, if the player is gone for a while people may not know they are actually AFK, adding this in tab menu for 1.7.10 would make it way more noticeable.
Often I find myself going afk throughout the day, and I naturally use the command /afk. Many a time people are unaware and message me. Without getting a response, they think I'm ignoring them and that's no good. I suggest adding a message "This player you messaged is afk" in response to messaging a player in the afk state.
Huh, I actually thought that was a thing! Guess it was only in 1.6.4 But, even then sometimes you don't get a pm because the person asks in general chat and they just think you're ignoring them.
Its allready in there. just do ./list and it will list all players and mark those afk with an afk tag.