I can't really think of any
really dumb questions people have asked, but I try to avoid judging people on that because just a year ago I knew virtually nothing about parrots myself.
I did have a "thought it was a toy" incident with Winnie one time a while back though, haha. I had her over at a friend's house to meet a few people and she was sitting on her perch when my friend's wife came in. Wife just kind of glanced at Winnie and started talking to somebody else. A couple minutes later I picked Winnie up to introduce her to a couple more people and my friend's wife says "Oh my god, that's your parrot??? I thought it was a toy!!!" (this is someone who knew I owned a parrot, btw - yeah, I just brought over a toy bird instead of my real one

).
I think a lot of people envision a "parrot" as being a huge bird like a Scarlet Macaw and when they see a little one like a Senegal or Quaker they don't know what kind of bird it is.