Poll: Stacking exit hexes - good tactics, or cheesy and unsportsmanlike?

[Herr Straße Laufer]

A good scenario design would give the army headed to the exits enough arty to deal with a hex piled with fodder.

Did you miss the original point John was making?

John wrote: "I use a house rule in which the stacking of exit hexes was not allowed, so that the exit hex terrain would not be blocked by wrecks, along with other reasons."

He was referring to the cheesy tactic where a player would load up the hex to block it and prevent his opponent from exiting and gaining points toward victory in the process.
If it depends on the scenario designer and not the players, I must be missing something that John is trying to say?

I don't mind a player defending an exit hex. Blocking it, with wrecks, is just something completely different?