Vanilla is a product of Lussumo:
Documentation and Support.
Mark is sending human missiles into Whitechapel, he can turn a person like Alice into a gun-wielding vigilante, he can slip weapons undetected to the new folks, everyone's worried about him poking around out there, taking advantage of the tiny brain humans.
Luke knows how to get executed by the rest of the Freakangels. Arkady gave him explicit instructions on how to get the death penalty by abusing his abilities, and yet we are to believe he was engaging in this exact inexcusable behavior in broad daylight a few hours later, a few rooms over from the cop, while asking for privacy during the act.
Who, if anybody, would send Luke a romantic afternoon with a human drone? If it can happen in Vegas it can happen in sci-fi, right?