I think Nike Golf has a very valid point about having an opening the entire round and players up your butt. That makes me very uncomfortable and makes me play faster. I hate holding people up. If I'm waiting on a group and there are others right behind me, so be it.......but if there's something I can do to speed up play I will.
From what it sounds like in this case tho is even if there wasn't a gap the people behind would've still been hitting into them because they were a**holes.
And hitting into the group in front of you ONE TIME being forgivable.......whew. I have done this but not on purpose. I'm a very high handicapper and a few months back I must've hit the sweet spot, with good timing, and excellent balance or whatever because I nailed my 3 wood farther than ever! And it went into the group in front of me. I didn't yell "fore" because there was no way my ball was going to go that far (so i thought). I didn't hit anyone but I felt very bad and embarrassed when I saw where it landed which sucked because it was probably the best shot, mechanically, i've ever had.