We have two Associations in my area. I purposely aligned myself with the Association that is further away, as my son and many of his friends, who I coached for many yrs, are still involved in Fresh/JV games in the closer Association.
I was assigned one my son's schools scrimmage games this yr as it crossed Associations and asked our Training Committee if I should ref it. They said it would be ok - but, never in regular season.
I do a lot of Rec Games for kids I've coached too, but, both teams usually have players on it so it's no problem.
I know I can call it fairly, as I have been forced into action to ref my son's teams before. But, as you allude, you just simply don't need this issue - there's enough to worry about.
Hey, did that kid dunk in warmups? TWEEET!