If I was coaching my team, by the time they get, say NINE goals up, I'm double shifting my bottom 6, putting my PKers out on the PP, and basically treating it like a practice.
There is never a good way to play a game like this. I live in a town where the minor hockey is very, very good. W/o fail they end up in a laugher a couple of times a year. 6-0 down in the 1st, and the other team has barely touched the puck. The coaches tell their team to enter the Blue line, then retreat to behind their own net, then break it out, then cross the Blue line, circle back, break it out... bottom six or top 6 matters a little, but not too much, as the bottom six is still much better than the other team's bottom six.
Meanwhile, the other team and team's parents gets pissed because they think they are being disrespected. Sometimes things get a little ugly, with the kids on the losing team chopping at ankles, boarding, etc..
IMO the best way to play it out is give your bottom players more ice time than usual, and caution the team to act with class. In a 14-1 game, the other team will be happy when they score, weird as it might sound. What they don't want is to be patronized.