Definitely. I remember when they first brought in excess fuel carriage tables in my company. You had two groups who tried to get to opposite ends of the table, treating it like a competition, while the rest of us just took what we deemed appropriate on the day. The dangerous bit, IMO, was when some individuals vying for the top spot started returning negative excesses - they were using get-outs in our fuel policy designed to be used on rare occasions every time they flew...