So under Authorization and Authentication (p. 225 SR4 Sp. Ed.) it states that in order to allow you access to anything beyond a public account [...] the node must have your access ID associated with an access level/account privileges. (for example, your soycaf dispenser will have your access ID on a list that shows that you have an admin account on its node).
So if you've spoofed your Access ID can you log into your drones or vehicle, it seems to imply that when you changed your ID they would no longer recognize you as having an account on them.