I saw that thread. It was on the General Archery forum, not the Bowhunting forum. Nowhere on that thread did anyone mention bowhunting or shooting at animals. So I'm a little confused as to how that thread spawned this one.
With respect to shooting 100 yards:
Before field archery (shots out to 80 yards) became popular during the middle of the last century (i.e. long before compounds), the standard target round was the York Round.
144 arrows: 72 @ 100 yards, 48 @ 80 yards, 24 @ 60 yards.
Folks in this country were shooting York Rounds back in the 1800's and early 1900's with selfbows and wood arrows, which I suppose were high tech for the day. Saxton Pope even mentions York Rounds it in his book, including scores for himself, Young, and Ishi.
It's somewhat ironic that our recurves, longbows and synthetic arrows are a lot better than what folks used 100 years ago, yet we as a group think shooting anything (including targets) past 20 or 30 yards is something to be shunned. Shooting targets at 100 yards isn’t a “cable gun” thing. It’s an archery thing – one that’s been around a lot longer than any of us has been alive.