The famous bad habit of vacuum wipers (used by Ford after everyone else learned): it's raining, you accelerate to pass a slower car, vacuum drops from perhaps 10-15" to 5", and the wipers stall in mid-swipe, leaving you blind until you let off the gas.
What a PCV does not do is dispose of high crankcase pressure:
1. it was never supposed to.
2. it's caused by bad ring seal, not a badly engineered system.
3. if you try to seal all the outlets it will blow out the dipstick, valve cover gaskets, pan gasket, etc. and spray oil vapor all over the engine. If you're lucky, it won't land on the exhaust manifold and burn the car down.
4. adding "breathers" to the valve cover: read 3. above.
5. the best you can do (other than new rings) is a large diameter duct (to keep the vapor speed as low as possible) from a source (valve cover, timing cover, pan, valley) into a labyrinth with baffles that prevent the oil from escaping, and release only (relatively clean) hot vapor.
