It's not possible to block a tor site, you're correct.That came up in another thread, the new url thread, actually, and I posted the a link that explained that a relay node has no idea what traffic it is carrying, whether it is for a hidden service or relayed for a tor to surface session. If this wasn't the case, hidden services wouldn't be hidden.So no, not LE or anyone else could pressure anyone into blocking a hidden service by any means whatsoever.