Obviously not big enough to care about, its just another person trying to mislead us. To what end? Picking up after yourself?
Some people have such horrible motives for misleading us.
Plastic Breaks Down in Ocean, After All -- And Fast
In many areas the overall concentration of plastics was seven-fold greater than the concentration of zooplankton. Samples collected at deeper points in the water column found much lower levels of debris (primarily monofilament fishing line), confirming earlier observations that most plastic waste concentrates in the
upper water column.
Right in the most productive areas of the ocean, where plankton gets eaten and transferred into the food chain where it ends up in my stomach messing.
Nothing you have given makes this less alarming.