I Was Kicked From A Battleground

Your character receives the idle debuff to let you know that you've been inactive for too long, or reported for being AFK. If you don't engage in PvP combat within 1 minute your character will receive the inactive debuff. You have 1 more minute to engage in PvP combat. If you don't, you will be removed from the battleground.

If you've been repeatedly reported and kicked for being AFK in multiple battlegrounds, you may be considered a repeat offender. Repeat offenders may receive the idle debuff and have a chance to stay in the battleground by entering in PvP combat within 1 minute. However, if the repeat offender receives the inactive debuff, they will not receive the 1 minute to engage in PvP combat but will instead be immediately kicked.