I always refer to Smokey Yunick putting a window in an oil pan & filming the rotating assy picking up the oil and creating basically a rope around itself, which then aerated the oil. That was in the early '60s, IIRC.
Most trays don't allow enough drain-back, so either the one-way mesh or cutting additional one-way slots in them are good ideas.
Another way to prevent windage is a deep pan with the oil a few inches away from the crank, but I still run a tray on my deep-sump motors.