What's with all the passive-aggressive statements? I doubt his mystery will trigger without the other ninjas attacking, unless he has high initiative and his gaara is position 1. Since his mystery triggers during his turn of action, many people who uses barrier ninjas will time it right when his turn begins.

For example, Gaara will move after the the enemy's lightning main attack. After your opponent sees the lightning main attacks, he queues the mystery immediately right before Gaara's turn triggers. It sends the information to the game server blah blah blah and before you can react to the symbol on his head appearing after the server sends the information to you, Gaara's turn already triggered and his barrier goes active.