I get those as well. My favorite is when Millie and I were at Borders and this lady comes up and asks if Millie is a service dog. I nod, thinking it's a bit odd that I get that question all the time because she has a vest that says "service" dog" and "medical alert dog." We chat for a while and she repeatedly talks about how lucky I am to have a dog who assigned herself to being my SD and that she's a wonderful dog. (I agree.
) We part ways and as I go around the store I keep seeing her behind me. I turn to her finally and ask her if she has any other questions. She says, "Well, yeah, uh, is she for sale? I would love to have a dog like that." I just gape. Finally I say, "No, she's not for sale!" She looks wounded and rushes out the door.
Not only am I not going to give my dog to any asshat who asks, no, you **** well can not have my service dog!