Noblock has its good and bad side, which you just pointed out one. However in escape maps, having noblock off causes too much headache and most of the time ruin all the fun because of the idiots and assholes that love to exploit it. In cade maps, I do agree that block should be left on for now just to be fair on both sides.
And as I've stated before in earlier post, the regular ZM admins are always on top of their game. They get things done swiftly and enforce the rule fairly to everyone. So yes, they are doing their jobs.