In case you didn't know plastic is evil. It lasts in the environment for a long long time. Not that we can do much about it - like everyone is going to stop using plastic.
How much of a problem? Look at this video from VBS TV.
Easy to ignore when it is so many miles away. Besides, what can it harm? Do we need that part of the ocean to be cleaner? I don't know, but my gut tells me this can't be a good thing.