Look, it's not that hard to understand, is it? This is posted at the start of every match thread and it is pretty clear, most people seem to grasp the point (and it has vastly reduced the number of reported posts in match threads so far this season).
Please stick to discussing the match in question and do not accuse match officials of being biased or corrupt or you run the risk of being immediately banned from the forum.
Get it? No one is saying refs are infallible, or that when they get a decision wrong, you can't argue the toss about it on here.
Where it crosses the line is when people start saying stuff like: 'wah wah wah the ref hates my club, he never gives us anything, he's deliberately helping the other side, he's been bought and paid for, it's a plot by the RFL to do us down, wah wah wah'.
There is a difference. Hope this clarifies it, for anyone who doesn't understand.