Besides being wrong, it prevents the skater from being able to spin at all. The scratch spin turns on a left forward inside edge. Finding the balance point on a spin is something that takes a lot of patience and perseverance. It's not something that is going to quickly happen. It takes a lot of practice, but it will gradually come around.
Most coaches recommend starting out working on two foot spins.
Two foot spins are safer and the beginner won't feel like they're going to fall over. I like to recommend working on pivots for both the scratch spin and the back spin. Pivots are safe and they help you find your balance point, unlike the two foot spin. Don't worry so much about the spin as about doing a good pivot. Try and do a one foot spin in your socks on a slick tile or lanolium floor.