While an FBO might have policies, published hours and options galore for the wayfaring airman, at many airports, the lowly line man or woman is your first and last line of defense when you are up against any of the scenarios he mentioned, and a host more. They can make or break your trip, and they know it. How much he or she cares may very well be tied to how you treated them the last time your presence graced their ramp.