Rugby Union officials have some advatages over Footy Refs that make their job easier to control the game, I feel.
Firstly the culture of Rugby Union which has only been profesional for 12 years hasn't quite slipped into the win at all costs mindset yet (although we are seeing a gradual increase in the amount of back chat being thrown at a ref by certain players)
Secondly the sanctions a referee is allowed to use for innapropriate behaviour give him more 'effective' power, these begin with the 'Walk 10' where if the referee is unhappy with comments that have been made after the award of a free kick or penalty the infringement is moved 10 metres closer to the offending team. A yellow card and 10 minutes in the bin can also be used (although very rare in this case) for foul and abusive language. Penalties can be reversed (which I've seen in a Gloucester-Northampton match a few years ago when a Northampton player tried to get a Gloucester player sent to the bin for killing the ball on a Northampton attack in the Glaws 22). Players can also be cited after a match for abuse of match officials either directly or through the media. What ever sanction a referee chooses to use in most cases either lead to a direct scoring opportunity, field position which gives the possibility of a scoring opportunity, the loss of field position when attacking or the chance of going down one man for 10 minutes which can be worth between 3-10 points in Elite standard games. In Rugby terms these are extremely important as it takes a lot of work to get up the field.
Thirdly the use of Television footage in deciding the validity of a Try if the referee is unsure takes a little pressure off him and his Touch Judges when needing to make some of the 'Difficult' decisions, although this isn't fool proof as in the last few years TMOs have made a few blunders.
rotters, don't think there's no swearing at the ref from the players in Rugby, when you're at a match that's selling Reflink it can be very enlightening