Scott/Emmeline
They've clearly got good R&D. The fact that the quarantine can contain virtually any of us regardless of power type or level speaks to that. And it's R&D we're not aware of, which makes sense. We're an unknown entity both individually and as a group. I'd say its more likely they've been working on some device to block telepathy for some time and just rolled it out.
But I'm curious if there's not someone more in the know behind it, or, how they're doing this and what their ultimate goal is. We've seen a lot worse following power neutralization attempts back home and in other timelines. It should be alarming, but usually more for us than their safety.