I completely agree with you. All it takes is one good hit for the blood to start flowing. It's not as if the bar is riding on my shins every rep.
With DLing, I really been focusing on increasing ROM. I had a friend (an experienced lifter) critque my form this summer. I'm focusing on getting a deeper knee bend and lifting through my heels (the pushing through the floor concept). I used to rely on my back too much in the past.
I'm going try a combo of athletic tape, duct tape on the shins, pants and athletic tape on the bar. I just don't want to freak anybody out anymore. I get enough stares with my lifting chaulk and kipping pull-ups.