Now you are just saying he is sneaking around. Before you said he was trying to start a fight. If in fact he is trying to start a fight then dar at 0 will not hurt that at all.
Sneaking as a tactic to surprise attack a base, when defenders will up, a fight will occur.
A player sneaking to a base, eventualy will start a fight, even if it was not his intention.
A dar at 0 will not allow said player to sneak, thus he will not try to attack a base and no fight will start.
I don't have to explain this if the game was like this for the first 10 years? Thought that this should be pretty obvious.