those skiers are what I'm most afraid of on slopes, they don't seem to care about the people in front making turns, and they just go straight right by you, scaring the sh*t out of me every time.
They do not understand turning, or, especially, snowboard carving, and are unable or simply unwilling to ski without risking collision from uphill. Littering the slopes with hazard.
Oh look! There's a skier just running into you. I'm so scared I can't carve properly if I know somebody is behind, I know they don't understand that I'm just turning back and forth regularly.