I volunteered to spot for the players (including some pros, as well as some "pros") at a local tournament recently, and the guys who ran the show were great as were 95% of the players. I got many thanks for my time, etc., which was very cool.
There was one cocky guy whom I won't forget, though. When he landed a 400'+ teeshot that had to hyzer around a large tree on a stretch of land about 30' wide (dead center), I complimented the throw and said, "Man, I'd like to see that one again!"
He answered in a manner that indicated how bored he was with his own greatness, "How many times?"
Just my personal opinion: don't be that guy. I passed up the majority of a day with my family to give something back to the sport, and it's too bad that the one jackass in the field is the thing I remember the most about an otherwise fantastic event.