Additionally ... the surface waves talked about in a physics class don't have the same meaning as the waves talked about by beach-goers.
So, when discussing waves relevant to a floating community in open water, what we would observe on the water surface are swells created by surface waves.
Without wind to blow over the very top of such swells, they would look like bumps in the water. Maybe they would be big linear bumps, but still they would not look like a surfer's dream wave.
But the energy in all surface waves can be dissipated by refraction or scattering, which is why there are other discussion threads about such things as breakwaters and ramforms.
Simply put, a location surrounded by such Surface Wave Oscillation Refraction Devices cannot have a "rouge wave", because the momentary intersection of multiple surface waves can't happen if those surface waves were previously dissipated by the surrounding devices.
Whether the floating community was surrounded by ring of large floating objects or a wide hortizontal ring of floating mangrove forests, the result would be the same ... the energy of surface waves would be dissipated and large surface waves of any type could not subsequently form inside that ring.