I would not have a problem, practicing on a (practice) field. IF WE KNEW THE RULES. Our first game should have been Saturday the 18th, but rained out. Now we play this Saturday, and still the coaches do not know all the rules. The kids have yet to see the field layout like it should be. This year is 4 on 4, no goalie, co-ed, and some half circle up infront of the goalie box that you are not allowed to get in, no throw in, only kick in.
And the day we got the jerseys, at (coleman park) teams were practicing on 3 fields,(I guess it was ok that day) but then you have baseball teams practicing on some soccer fields also.
Just a complete set of rules and regulations would really be nice, and let the kids get familiar with what the field is going to look like. Or better yet let the coaches know, so they can pass it on to the players and parents.