Actually on a turbo you could run one of those little fuel filters and run a hose to the intake pipe after the filter but before the turbo. I belive sr20det motors are set up this way with a hose from the valve cover to the pipe in front of the turbo.

Anyways it would be good to hook it up, the suction helps relive the pressure that builds up inside the crank case. Another solution would be a catch can. I made one on my old setup out of an A/C dryer. Worked real well.