It is in no way a cheese. It is a strategy just like standing on the ledge to shoot crota was a strategy. It is still a risky strategy that does have risk involved with it. So stop calling it a cheese and realize when people design games they are not able to always tell what people will do to beat their game.
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Cheese does not equal no risk. The middle "strat" was in fact a cheese. I am not saying a cheese is bad, I'm simply defining.