True, although even back when scrums where real and you didn't get a few week ban for accidentally hurting someone in a tackle, it still wasn't allowed (and, you don't have to look that far back to see when its happened before).
Personally, I'm not looking to defend anyone who did it, I more so just don't really care.... its the NRL and the media building it up like its a first, and the biggest deal in the world. Seriously, they where water bottles.... where it not for a clumsy ref trying to dodge one, slip and break a bone, we wouldn't even he hearing about it.
I say ANZ are behind pumping up the story to avoid the clear OH&S issue with a ref slipping on the flooring and breaking a bone to avoid a compo claim.
Throw a half empty water bottle at me right now.... I'll say "ow" then move on, its really not such a deadly weapon