This is usually a meet and greet sort of thing for casuals. They didn't seem to mind that I wasn't in highschool, but I think I came in after the official event.
If a few community representatives for some games were allowed in to demonstrate game mechanics, show good sportsmanship, and promote local gaming events, it would be a great opportunity to network with younger gamers and allow them a venue for participating in the greater competitive gaming community at large if they were so interested.