Honestly, I wouldn't get too worked up about it. I know you know that your dog wouldn't hurt anyone, but as Karen said, you never know what sort of experiences a person has had that makes him/her afraid of dogs. I'm sure the man wasn't trying to be rude, just cautious. Personally I prefer it when people approach Lefty carefully, as he's a bit anxious.

I do love pitties, though, and have wondered what kind of reaction to expect if/when I ever own one, as it's such a maligned breed! I suppose I'll be "educating" a lot of people!