When normal customers "find your behavior odd," the worst they'll do is not tip you. But when your customers are cops, they'll go through your surveillance feed. Lesson learned.
It isn't the waitstaff's only job to serve you. They're also interpreters that can skillfully translate a wide variety of awkward-speak.
Every ounce of the server's ability to deny and deadpan will be required.
Unless the M.A. is in servage, that is one very depressed Starbucks employee indeed. Oh well, at least they give benefits.
The "large" sizes at McD's are practically two liters anyway. I doubt that bottle will last long.