While insulting Tony Stark over email would be silly, it might actually be useful as a distraction. It seems like Tony hasn't yet realized that Ultron became sentient and thinks that some terrorist organization hacked into one of his suits and stole the CRADLE. Maybe we should try fooling him into believing that really is the case. Send Tony some grandiose threats, some outrageous demands, set up a few red herrings and watch as Stark goes on a wild goose chase all across North America while we focus on our real plans.