I didn't mean to suggest a targeted attack. If the goal is to just overwhelm Apple's system, the attacker doesn't need to target a particular phone, they just n

I didn't mean to suggest a targeted attack. If the goal is to just overwhelm Apple's system, the attacker doesn't need to target a particular phone, they just need to distribute lots of colliding images to some phones. Even their own phones, since the colliding images wouldn't be illegal.