Let the Libero Questions begin

[DaveASA/FED]

I went to my state rules interp meeting last night, boy was it fun. We (Indiana) are going to the Libero position this year. I had a question about this position. One rule that made me think, if the Libero sets the ball in front of the attack line no other player can attack it over the plane of the net or it is considered an illegal attack. How often does this happen / get called? It seems like a hard thing to enforce / watch for am I over thinking this and it is easy or does it just not happen so don't worry about it?

Thanks in advance!