The thread on Ross and blindness led me to wonder about the acceptability of blind holes - especially for significant amateur or professional competitions. Does their existence work against a course being used for an event?
Littlestone's (final Open qualifying venue in 2003, host for British Ladies' Amateur in 2005) par 4 #2 (I'll post a picture if I can find it) originally had a totally blind approach. The green was set in a valley about 30 yards behind a high dune that extends across the fairway and required a completely blind approach. According to the club history, MacKenzie suggested in the 1920s that a cut be made through the dune; the cut was made 50 years later . It's very symmetric - dead center of the line of play with 45-degree slopes on either side. Even with the cut the putting surface is still hidden but at least the top half of the flagstick can be seen if the approach is made from the appropriate side of the fairway.
What would you expect the reaction of the R&A - or the players at the Open qualifying - would have been if dune had not been opened?