I would leave it up to the discretion of each pro golfer. Personally, the chicken sticks I have for legs would work to my advantage as opponents take one look and start laughing, losing concentration! Given that the pros hit balls off line as often as amateurs (alright, not quite as often, but they do - Remember Kevin Na in Texas a couple of years ago at the Valero Open where he took some large double digit number for a score on one hole? Imagine him in that thicket hacking away while wearing shorts. He'd have emerged bloody as well as unbowed!), long pants are clearly protection against the various maladies awaiting wayward shots..Poison ivy, creepy crawlies, branches, and other detritus beckon the bare legged golfer..