I hate the "get any good shots" from the members of the public as you walk through the pits.
No sir/madam, I was standing out in the rain all day with the intention of taking crap shots.
That doesn't bother me too much, either. Like someone else said, it's usually just an attempt to make conversation. And, well, sometimes I'm not getting "good" shots.
In a similar vein, but non-photo related, I used to live in a mixed-use neighborhood and would wash my car by hand often. Every... single... time... some yahoo would walk by and say he was going to pull his car up so I could wash his next.
I never said what I really wanted to say... "Wow, that's funny. I've never heard that one before. Yep, that's original. Did you think that one up on your own?"