This is such an immature post and it makes me think you are much, much younger than '18-24'.
If you are working with someone else, let them pull up on their end.
Additionally, they usually keep their hands occupied.
Sometimes people do wedgie for fun or sometimes for hurting the victim.
Though back to the main catch on this, supervision.
This keeps the pants on the floor and you can wedgie them right out of their pants.