I saw him just a few weeks ago, he looks the exact same now as he did then. He was with his girlfriend, my how time flies.
During my son's first season at U7, we had a young man that was at least a foot taller and 50 pounds bigger than every kid. We carried his paperwork everywhere, but usually just having dad there removed any doubt he was the right age(6'9" 295).
As for how often, I remember a few years ago at U10 our team and a South Bay Force team with Luis Gil were the favorites. Out of nowhere, a Celtic team started just running over everyone through state cup. By the 3rd weekend, every parent known to man had done their due diligence including following people home,etc. Needless to say, they had 4 players overaged and the team was forced to drop. As was said, losing keeps people from caring.