Hey SailorJohm-
It all just seems so sneaky - why so sneaky?
I mean I hear your reason being you want to avoid drama but if she is the drama-maker you do not have to engage in the drama.
To me it's pretty dramatic on your part to sneak the keys off the rack and txt message her about her lack of a vehicle (a bit of a shock I'd imagine). I mean regardless of whether she is an A or a jerk or just someone you want to end a relationship with it seems you owe it to yourself to be more straightforward and HANDLE whatever drama she creates by not feeding the fire...
Certainly a thought provoking post!!
Peace,
B.