Greg/John,
I never really found the famous Dell hole at Lahinch dangerous.
Whenever you play a Par 3, you always have to wait until the group in front clears the green. On this hole it is very easy to see when this happens: the seventh tee is plainly in sight. Moreover, when you make your way over the hill on #5, activity on #6 is plainly in sight, so I can't see what all the fuss is about. My guess is that people, especially Americans, don't play such a hole more than a couple times in their life and they just find it odd. But, dangerous? I think that's overdone.
Now what about #5? I suppose a better case can be made that danger exists on this hole or that avoiding danger is kind of a hassle as you really need someone to climb the hill and check out where the group in front is. The club positions someone in that little hut over the hill, but I'm not altogehther sure how effective that person is. You can't even count on such a soul being there.
Anyway, if we were to change these holes because they are dangerous, what does that say about the famous 3rd hole at Prestwick? Isn't the second shot more likely to hit someone than either shot at Lahinch?