I agree with Ded, ammo dumping makes not much difference, I like to keep my ammo because if I win I will have to keep fighting till I run out of fuel. Anyone who feels the need to use F3 mode or to gain extra E and dive in before icon range is only cheating themself.
No one who duels regularly really cares if they win or lose as long as they gave a good showing of themself and had a good fight.
There is only one person who gains respect for you when you win, that is you gain respect for yourself. If you had to cheat, there is no self respect to be gained.