SEATTLE, Washington - West Seattle Golf Course was built in 1940. I'm betting that the current practice green has been in its current location for a long time, if not for the whole history of the course.
So now, in June 2009, they finally decide to warn people that errant drives from the 18th can pepper you while you're working on your putting? We already know this. In fact I launched a ball there once from the 18th tee myself.
I think an especially wild long-hitter could whack you from the 17th tee, too.
I don't know how you're expected to take "due care" while practicing your putting. Someone yells "fore" or they don't.
The sudden appearance of this sign can only mean one thing... someone got their ass crowned recently.