Bialy
Yes the ridgeline has anti sway features, but I feel there is still going to be some sway and the bike may bump together. This is not a major concern to me as a little bumping should hurt the bikes.

Hey Maddmaxx
I did think about the loading of four bikes on the rack and the LBS said that the three Hybrids and the FX should load fine. I figure that he knows best as he sells all the bikes and the racks.