I placed some tape over 'hasselblad' wich is written on top of my camera, I just don't like it when people start asking that question, I just want to take pictures.
But yes the "is that a movie camera?" or "that must be very old?" questions are very common. A few weeks ago I had the golden tip from someone I asked to pose on the street, she had a digital canon and told me "it's rather inexpensive nowedays, no use to carry around such a heavy and old camera anymore".
After that remark I didn't focus the picture I took of her.