This is not working as intended. It will be patched soon.
The queue system is really buggy (as we've all seen with the battleground queues). The reason this works is that Tol Barad temporarily adds you to the battle's queue and then removes you after 20 seconds even if you don't physically accept/deny it. What you do here, you artificially inflate the amount of times you are listed in the queue. When a player of the opposite faction joins, a randomly selected player from your faction is given the opportunity to join as well. The more occurrences of your character in the queue, the more likely it will pop for you.
This is 100% a bug. Any idiot that says otherwise needs to L2P.