Yep. Everyone has those. We have several but the most notable and reason why is below...
Our team had just moved up to 10U and beat their 97's 3-2 in the previous tournament (who were still playing down in the fall). After that, in the Spring, they used fake birth certificates to bring in some of their 96 and 97 players (pitcher and catcher included) in order to beat us in tournaments. Reason I know their age is my DD had played on a 10U team when she was 6 and and they were on it. I still had copies of their LEGAL birth certificates. They finally got caught and thrown out of several tournaments and we never had to play them again that season. That coach is still coaching on a younger team and we ran into them about 2 months ago. We put the pedal to the metal and refused to step off bag or give an inch. People may not approve, but we put 20 runs up in one inning and ran the time out (we were home team). They were 3 up and 3 down in the first all on strike outs. They were STILL playing their 98's on that team instead of them moving up to 12U.
OH and for those who complain, we turned all our girls and batted them opposite handed (lefties batted right and righties batted left) and they still only managed 2 outs. It felt great. I felt a little sorry for some of the girls on that team, but the majority of them have older sisters who were on the team that beat us and their parents were in the stands. They knew what was going on and in all honesty, if you can't get 3 outs with running through the entire batting line up almost 3 times, then you have a problem. Cheating should NEVER be acceptable and we got phone calls from several of the parents of kids on that team apologizing for what they had previously done. They were just "embarrased"

that their 97 team got beat by 99's in their first tournament to move up. We have done that to them again (not quite as severe - 2 innings this time - 18-0), but they now avoid any tournament we are signed up in like the plague.
The girls know that losing to them is not an option and they always get hyped to play them. We have the same team together with only 1 exception as that first tournament and they REMEMBER and discuss it before the game just to remind each other what it means!!!