A mate was "marked down" on a line check because he took discretionary fuel to a place notorious for springing a TEMPO on you. The weather had all the ingredients for thunderys, but none were forecast. He used his discretion, experience and knowledge of meteorology to predict the highly predictable. The thunderys eventuated and he had to hold for 50+ minutes. The checkie still berated him for not blindly following the company "fuel policy" and then sat back while he tankered 5500kg back to a CAVOK home base (as per the company fuel policy), at the princely sum of 55kg per 1000kg. Company fuel policy has been pushed so aggressively that in some places that you can be penalised for using your noodle.