That's every single pass thrown by a playing moving towards an opponents goal line then.
No way.
I agree that if they are running at close to full throttle straight towards the try-line (such as centre to winger or anytime they are on a long break and draw and pass) then it is close to impossible to pass it backwards and the benefit of doubt absolutely should be that it has gone backwards out of hand, but otherwise it is easy to pass it so it get caught behind where it is thrown.
The bottom line is anyone who thinks they can tell live that a ball caught 1 metre or more in front of where it was passed was actually thrown backwards out of the hands is having themselves on. At best they want to have a look at the replay before they get irrate, and the refs don't have the luxury of doing that.
So we should accept that if it is caught a metre or more in front of were it was thrown the refs have to make a nearly impossible call on how it left the hands even though it looks to the naked eye like a forward pass. Its just a refs call.
That Trbojovic one was the right call because it looked like a crap pass and it went at least a metre forward when it didnt have to.