Bad Idea.
Attacker has to pay. If they still fight, then its ok. Maybe they are "training", its not their fault, that there is a disbalance in fraction size.
When the enemy is not giving uo at all, its just a good news!
the eefender is collecting op material, if you dont want to do anything for it, just stway away? no one is forcing you to stand 2h, go train or digg.