Clear Sidelines

[babrown]

Here's how I handle this on our crew.
If I decide that a sideline warning is needed I only do it after a change of possesion and after the referee has maked the ball ready for play and ALWAYS in the first half.
There are two reason for this.
First, it let's everybody including the oppossing coach that we have a sideline warning.
Second, I'm not stopping the flow of the game like I would if I called the penalty while a team is driving. If it wasn't a problem in the first half it doesn't need to be called in the second half.
I have never called a 5 or 15 penalty using this method. Coach/official interaction has been fine as the coach knows I'm there to work hard for them.
Hope this helps.