You only have to watch some of them, (most of them), on Sky, they seem very adept at picking up some obscure technical detail to penalise time and again or some minor infringement, but almost every time there is a try scored, they can't then see what went on and call in the video ref.
I would like to see the tackling and PTB sorted out, but when they can't do it consistently throughout the game then they spoil it for one or both sets of supporters and then they ruin the game.
Penalise the obvious PTB / tackling infringements ..... fine, but don't go to the FEoaF just for the sake of it.
Going back to my Sky comment above, where camera are not available, (Championship etc) suddenly refs are capable of making decisions on trys...........very odd.