Ring a bell to signal the next group...I've not run into that practice before. Interesting. It sounds like a good idea especially on some holes where hills and valleys obscure one's visibility to see the all clear.

Yesterday, I played a round of golf at a course that I had never played before. It was challenging because of all the water and the fact that picture signs of the course were not very good or lacking all together. On one hole a ball hit very close to the green where we putting out. I was on the back side close to the hole while the others were on the front a good distance from it. The most intolerant member of our group immediately protested to the foursome behind us. I was momentarily unaware that the group hit into us. It was a second shot for someone and had to be 220-230 yards out. Lucky shot I thought. There was no cry of "fore"...nothing. I was told that it barely missed my playing partner. Maybe we should all play in hard hats!

PS--BTW, I've been hit once with a ball...luckily it bounced once before striking me in the back.