Interesting idea, but I don't think it will be a problem. According to the Filter Manufacturers Council Technical Service Bulletin #94-2R1.
"Blow-by gases and vapor should be removed at about the same rate they enter
the crankcase. Since blow-by is minimal at idle and increases during high speed
operation, the PCV valve must control the flow of vapor accordingly. The PCV
valve is designed to compensate for the engine ventilation needs at varying
engine speeds. It is operated by manifold vacuum which increases or decreases
as engine speeds change.
For example, at low or idle engine speeds manifold vacuum is high. This pulls the
plunger to the extreme forward position, or manifold end of the valve. Due to the
shape of the plunger, vapor flow is reduced to a minimum. The low rate of the
flow is adequate for ventilation purposes and will not upset the fuel/air mixture
ratio."
Also the air is mixed with fuel and oil vapors in the crankcase which are combustible. It's not like introducing raw air to the manifold.
If it does prove to be a problem the fix is very simple as you suggested.
Thanks for your input.
