How would he know you were "disabled" and not just getting prescription cough medicine for your really bad cold? Anyone that close when I'm at the prescription counter that they can read my "bag" of prescriptions or listen close enough to my conversation with the pharmacist is going to get a glare from me
I think he thought you looked good and just did the "new" public thing of trying to pick up chicks in grocery stores or other places they might be (Target :-)