Justin -
I agree. The assumption of risk defense only works if the shot was one that is normally attempted on a golf course. It would not cover intentional acts where I go out of my way to try to hit someone or, say, hit a shot perpindicular to a fw just for the heck of it.
But those aren't the facts in Tony's case in West Lothian. Involved there was a normally played (albeit errant) shot that happened to hit a guy in the eye. I'm pretty sure most courts in the US, under those facts, would buy the assumption of risk defense. If you play golf, you should anticipate errant shots.
Heck, in Georgia the rule is that you assume the risk of damage to your car if you drive next to a golf course. (A case that came out of a windshield shattered as someone drove along the 3rd hole at EL.)
On a related note, a couple of years ago I searched some data bases for cases awarding damages for personal injury on architects for "negligent" designs. Couldn't find any. I did a quickie, casual search, so maybe I missed some. But my guess is that such cases are pretty rare. I assume because of the asumption of risk defense. (There are, however, a number of torts cases out there involving golf course operators, but that is a different set of issues. And there was a recent case involving the 14th hole at Essex in Mass, but that was not about personal injury.)
Bob