I would enthusiastically support research and testing on this solution. Many of the objections to clean-up in the open-ocean are not relevant here. The depths

I would enthusiastically support research and testing on this solution. Many of the objections to clean-up in the open-ocean are not relevant here. The depths are very restricted, the ecosystems are more limited, the weather conditions less extreme and less variable, the plastics should be less broken down. The impacts and infrastructure would be similar to, and on the scale of, projects such as locks and dams. I would see this as a first step to source control. Looking at collected materials, it would become quickly obvious where the major sources of the plastics are, and they could start being addressed. There is a social issue here too though. I would expect this kind of project would be resisted in the same way that more local clean-up and source-control efforts in those regions are already resisted. Edit: There is also the issue that a sizable portion of the ocean plastics seem to be from discarded/lost fishing equipment.