Things it would be unwise for players to say to a referee:
Specsavers has a good deal on.Which of their players is your relative?
I know where you live.
When do we get our share of the 50/50 calls?
You're missing a great game, our one.
I don't know what we've done to upset you.
Could I loan you my rule book?
Summary: Show respect to the match official.