The main cause is the players pushing the coaches up towards us. Keep the players back, the coaches stay back.
Before the current NFHS rule and even now, my favorite fields are the multi-purpose turf fields- I tell the coach that during the live ball action to give me the white, you and your staff take the "green", and keep the players behind the blue, red, yellow, etc. soccer line. Rarely do I have an issue on those fields. For about half of them, the border is only about half the width specified in the field specs but I can live with it. As long as there are nice, visible lines, everything works well.
The older grass fields inside the track are the problems in our area. The sidelines are much tighter. When we started having to enforce the current NFHS rule, many of the HC's complained that their kids were having to stand on the track. My normal response was "they'll probably have a better view than me & you".
Now if we could only get the turf companies to add "clip marks" when they install the field, my life would be almost complete.
