Honestly, I dont know where this all came from about dragging the bar against your shins when pulling. When you deadlift you pull up and back and that is the only way to get your ass and hamstrings into the lift. If the bar is already against your shins when you start, there is nothing to pull back against.
Being flexable as shit will help this problem but so will taking advantage of your leverages and starting the pull with the bar a little further away. Try lining the bar up with the last lace on your shoes, the straight one thats right over the joint of your big toe. When you come down to the bar make shure to pull the slack out so your hips set, get back on your heels, and blow it up. The bar will make contact with your shins but not at the start.
Hope this helped.