Wayne,
My feeling has always been the area designated for golf, and its natural surrounds should be in play. In that spirit, Tigers instance at Firestone would certainly have been OOB, as I can't imagine it was ever intended for someone to play off the roof, (except for maybe late night, drunk-off-your-ass, betting shenanigans)
I can certainly see why playing up 10 was a safety issue, but it was one the R&A created by putting artificial stands in the way.... I am curious how 9/10 was handled in past championships.