I had a 'conversation' with HR one day about carrying a little extra fuel. I just told them two things:
1. If you think its expensive to carry a little extra fuel, try carrying not quite enough. That can get real expensive, real quick.
2. When I sign the Tech Log I am signing underneath the written statement that 'I certify that there is enough fuel and oil on board the aircraft for the purpose of the intended flight.' So if I am not happy with the fuel on board I can't legally accept/sign for the aircraft.
The 'conversation' ended pretty quickly after that.