So knees over the toes is bad? Go find some stairs and walk up them. Every step your knee will go over your toes.
Also, check out these guys -
http://omerocatan.com/photogallery/W...0%20SNATCH.jpg
http://www.kennislink.nl/upload/2001...0-reza_iwf.jpg
http://thefitcoach.files.wordpress.c...ghtlifting.jpg
Just a few examples.
If going over the knees is bad with a light squat, how are these guys capable of their knees going well over their toes with these huge weights on their backs or overhead and have no issues?