I find it hard to believe that anyone would let their decision making in a potentially dangerous situation (bad weather, low fuel, electrical fault, whatever) be influenced by the cost of landing, but perhaps I am being naive (after all, some people apparently seem unkeen on going around because it costs more).
As for landing fees generally, I really cannot see the objection to paying what is usually no more than £10 for using someone's facilities. How do those who object to landing fees propose that small arfields pay for their lawn mowers, fire trucks etc?