I've been hit twice, both times when I was a kid. One was on a course with nothing but (narrow) parallel fairways, caught a 250 yard drive square on the shoulder. Yes, it hurts like hell.
Our group is also one of the quick ones. We've never hit into anyone, but one member of our group has been known to lay up on a reachable par five instead of waiting for the green to clear. Probably the high percentage play for him, anyway, but he is just too impatient to wait when he can hit the ball RIGHT NOW.
Unfortunately at our club, the fast weekday rounds are coming to an end. Our club has some kind of fetish for organized leagues. So Monday afternoon is for outings, Tuesday morning is the 9 hole ladies, Wednesday morning is 18 hole ladies and Thursday is retirees. On the weekends the already congested tee sheet is also filled with an "A" team league, a "B" team, a senior "A" and a senior "B". And of course when people get organized they get serious and when they get serious they get slow.
Why can't people just play golf?