Possibly one of the most rigged leagues I've heard of.
Just came back from a game with my younger brother's team, and what a carry on it was. We were playing a team called Langcraigs, and they have a history for not keeping their mouth shut (last time we played them they threatened my younger brother because he's a powerful tackler) and today was just a laugh.
The referee, a pretty fat guy who we could tell from the start was gonna be dodgy, was very biased against our team. Whenever we tackled someone (even just a small tackle), the drama queens of Langcraigs were down and rolling about as if they broke their leg. We also had three obviously legal goals disallowed, with no reason given why.
And it gets better. My younger brother tackled a guy (from where I was standing it looked nasty but the guy wasn't complaining), and of course the referee couldn't miss it but Langcraigs started shouting abuse at him, the referee then said that my brother hit the player, my brother question's the decision and is red carded (he got a yellow earlier for a perfectly normal tackle). Then another one of our players questions the decision and he's red carded, for proving the referee wrong. Everyone starts shouting at the referee, especially us. A few of us started giving him dogs abuse, calling him bhudda and all sorts.
At the end of the match, the coach of our team talked to the referee, arguing about his decisions. Voices were raised and it was getting nasty, and there was plenty of kids watching. They went to the ref's 'office' (a small room with nothing in it) where they sat and argued. One of the player's mothers asked the referee to stop shouting because it was a bad influence on the kids, so the referee pushes her and things were escalating in the changing rooms.
So as you can see, under 13's has to be one of the most fixed leagues ever. And I should mention, this has happened alot where the referee is biased against us (no, it's not a state of mind which gives us that opinion, it's pretty damn obvious

).
Worst game of football, ever.