Imagine you're a defender and you decide to give your team some protection by erecting your morning ward. Then out of nowhere, a striker comes in and fists your team to oblivion. The only way to save yourself from that is to have a strong pullout game. I think it would be fair if the striker either gets pushed out when fisting, or his fist can only touch the morning ward.
[spoiler]Sorry for the terrible joke.[/spoiler]
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It think it's out that it destroys it however, it makes no sense if the shock wave can penetrate it. Razors edge can't, so neither should shock wave.