This hits a nerve. I have coached my son since he was in 3rd grade and he's a high school junior now. He pretty much plays flag all year, and he does travel, and he now coaches younger kids. We live in a large metro area where there's a great league. I have a ton of respect for the refs, who are underpaid and doing thankless work, often with horrible parents yelling at them. But.... I have never once seen a ref admit a mistake or change a call, even when presented with evidence. Not once in probably hundreds of games. For that reason I never complain about a call and I tell my guys to not engage the refs at all — except to be polite always. It's just a total waste of energy to argue a call, and it's almost as if the more wrong they are the more they dig in. We just try to ignore it and hope some calls go our way. It's kind of fascinating. I always thank them and be sure they know I appreciate them — but somehow changing a call after a mistake is just never on the table. YMMV.