Unless the M.A. is in servage, that is one very depressed Starbucks employee indeed. Oh well, at least they give benefits.
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.