In BAM, I see it as an advantage. There are no heavier air units, so not drawing out the traps doesn't have any real downside for the attacker. While yes, the air mines only target a single minion, am I correct in saying that having that one minion alive is better than said minion dying? It is a very small advantage indeed, but every little thing helps. In an attack such as loonian or dragons, however, it is a disadvantage to the attacker for the reasons stated in posts above me.
~Trap

