I don't get it. One of my pet hates with max is that ignore backfacing only works if the surface is facing away from the viewport (self explanatory). But what about the majority of the time when there are vertices behind the surface you're woking on which get selected because they're not backfacing? Viewport clipping's a…
It shouldn't be an issue really, backface ignore in blender will make only the visible polygons/vertices/edges selectable. I'm pretty sure other applications do it properly aswell.