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Deleted member 3432
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Valley of sin is the main hazard but these days they take it out of play by smashing it up the left side of the green far enough up so they are not pitching over it to the front flag position.
A great natural hazard that the modern golfer is sadly taking out of play.
This whole discussion is a moot point as the genie was out of the bottle many years ago and the manufacturers will ensure through threat of legal action that the distances wont be reeled back.