No. It won't. It really won't.
It might. Full Metal Alchemist Brotherhood, Gintama and Naruto are all available (mostly?) worldwide, as are 4Kids' Yu-Gi-Oh archive subs and probably some other stuff here and there.
Until this happens to One Piece, though, I see nothing really wrong with this. It's the same as fansubs, really, except it's less unnessecary work for the distributor. It's still something that won't be available on DVD for ages, and thus can't be legally supported. So what if these videos can be watched for free in some country on the other side of the world? What does that change?
(though yeah, distributing those Naruto subs doesn't really fall under this. You can pay to watch them now, or you can wait a week and watch them for free, all legally.)
And you can't really blame America for not getting to watch it legally.
Of course not. You can't blame non-Americans for wanting to watch the same series, either. If FUNi/Toei halts the simulcast because of this (which they won't), you can't really blame them for pirating it either - to them, it's simply a matter of "we get to watch" and "we don't get to watch". If there's a simulcast and it's being pirated, they get to watch, but an un-pirated simulcast being available is no different than there not being one in the first place.