A worker should be treated the same as a golfer. Would a golfer hit up on someone while still on the green? Same consideration should be given to the G.C. worker.
USGA has a educational video that covers this topic.
http://www.usga.org/turf/articles/video/maintenance_personnel.htmlA few years ago I was fertilizing a par 3 green when a group drove up to the tee and before I could get out of the way one of them hit up. I lost the ball off the club, but I knew it was heading my direction. I turned to take cover and it hit me in the back of the neck. Nobody even yelled "Fore." When they drove up with their happy little smiles the one who hit me goes, "did you see where my ball went?" I replied,"well, after it HIT ME in the back of the neck I threw the f*#@ing thing 50 yards into the woods!" He never said another word and the other guys just picked up their balls and continued to the next hole. I called my boss and told him exactly what happened and he completely understood.
Golfer think we are magically protected or something and when I catch them hitting up on myself or especially one of my guys they are very clear after I talk to them what the proper etiquette is concerning this subject.