Well the way it works on the blizzard servers is that you get a debuff and if you don't engage in pvp combat within a minute or so you get kicked so its not an auto kick you just have to prove that you are not afk to the program.
"You can report an inactive player by right clicking the player's portrait and selecting "Report AFK". When enough reports are registered, a 60 second debuff will begin to count down. Once the timer is up a new debuff will appear that will prevent the player from gaining any honor or marks while it is on. This debuff can be negated as soon as the player engages in PvP combat. This system is often abused, since a player can have good reasons for not participating in PVP, for example when he is defending."
from wowwiki
http://wowwiki.wikia.com/wiki/Battlegroundwas added in patch 2.2.0
http://wowwiki.wikia.com/wiki/Patch_2.2.0A new feature for reporting players as being AFK in battlegrounds by right clicking has been added. When enough reports are registered, a 60 second debuff will begin to count down. Once the timer is up a new debuff will appear that will prevent the player from gaining any honor while it is on. This debuff can be negated as soon as the player engages in PvP combat.