smothing like anti-kick from BGs

[rast]

hello!
i'm looking for a addon that would be accept reguest to enter a BG while AFK and not to be kicked from BG while AFK, and also warn me with some sort of signal like music or other sound.
It's a big problem to wait while u enter BG especially on high populated severs, and also when u went for a piss or want to make sendwich and u relize u got kicked from BG.
Basically this addon should:
1. accept request to enter BG only when user is AFK
2. do not become afk on BG (move characer a bit every for ex. 30 secs)
3. warn user that when he entered BG with some sound

I'm sorry if there is already such addon. WOuld be very thankful for a link. If not, can someone plz make it