Similarly, I played rugby to a high level and now referee it. The 10m advance for any dissent is priceless, and players tend to get more pissed off with their own team mates for conceding ground than they do with the referee. That said, touchline abuse is becoming more widespread and it's hard to police as it's very difficult to identify individual culprits. Thankfully, the RFU and County Unions are very supportive of referees and don't hesitate to sanction clubs as a whole if they don't control their spectators.