[pavbref]

Most coaches feel that the rules are too loose. With most USAVB matches using players as the R2, the fact that the center line penetration rule requires judgement makes this a non-call most of the time because they don't recognize interference. The centerline rule is close to the NCAA rule, but the NCAA is encouraging more calls for penetration if any opposing player is in the area of the fault. Injuries are more prominent due to contact across the center line.
Net contact can cause the net to bounce, and because of the tightness to the net of the players, potential for injury is increased.