Nebraska has a mercy rule for 8-man only. The game ends when a team is leading by 45 at half or anytime during the second half. This was also the rule for 6-man when we had that style of ball. 6-man is no longer sanctioned by NSAA, but a few schools out west play it in a conference. 11-man has no mercy rule, leading to some really nasty blowouts the past couple of years. One actually ended up 100-0.