If you don't want it, don't buy it. The problem is that things are too cheap, so people don't hesitate to ask themselves if they really want it. It's just too cheap to not try it. It's also one of those things where the picture doesn't match the actual item similar to fast food advertising. If the shopper was looking at the item in person, most things would not be purchased.

Dumping it directly in the ocean is just skipping a few steps as much of it does end up there. It would be better to just dump it into a landfill instead of the ocean though