I have to agree LB.
This issue HAS to be fixed because it has a real operational downside that increases the cost of private air travel in that aircraft needing to transit these locations are either going to lose payload because they have to tanker fuel, make time consuming detours, or suffer reduced fuel safety margins beyond statutory minimums.
In the meantime some can resort to jerrycans and unleaded petrol, but after the inevitable refueling accidents and spills, I expect most airports will ban that practice if they haven't already.