This is a good idea.

Since the arena split there has been an
inordinate amount of "slot camping".
There should be an auto-logoff after
an hour of no activity to discourage
this activity and free up slots in arenas
for players who want to play the game,
not just camp a slot.
If you need more than an hour to deal
with the interruptions to your AH life,
kindly log-off so another player can
get a slot in their preferred arena.
Lets face it, auto-logoff is a paradigm that is
employed on every other online game.
Why shouldn't it be adopted by AHII?
There is clearly a need.
David