Defaults are a powerful thing, and usually I like opt-in. In this case, opt-out makes sense to me, because the people who care about net neutrality already know

Defaults are a powerful thing, and usually I like opt-in. In this case, opt-out makes sense to me, because the people who care about net neutrality already know about the opt-out by now, and the service needs large scale opt-in to produce real results. HD Voice is similar, it needs wide adoption to start paying dividends, and I hope it starts being opt-out instead of opt-in.